Results 1 to 11 of 11

Math Help - Percent / Parts - basic callculation

  1. #1
    Newbie
    Joined
    Jun 2010
    Posts
    6

    Percent / Parts - basic callculation

    HI folks
    well, cant find right word in conversation with my friend ... on first place its connected with biology ,than chemistry and math.
    Math in this case make problem (we make problem cause cant agree about calculation) so we cant continue with talking about chemistry (at least meds)

    Please if you have time read this and try to give right answer if you know ... THX

    Nettle have needles, each needle contains some % of Acetylcholine, of course there is several of another chems but we looking and are focused at Acetylcholine.
    Lets say, 10 grams of all collected leaves (for testing) contains 50% of needles but because mechanical isolation it must be presented and some leaves/plant material.
    If we mechanically isolate needles (to observe and concentrate acetylcholine) we got 5 grams of "needle resin" who (beside other chems) contains our acetylcholine.

    1.) Concentration of acetylcholine in leaves is 10% (we use big numbers cause cant calculate decimals )
    We got (by weight) 5 grams of needles of total 10 used grams of plant material I said its ratio 50% : 50% or 1:1

    (He said its .)

    If you have leaves that contain 50% ,by weight, resin, meaning the acetylcholine:resin ratio is 1:2
    What is correct ?

    2.)I told him to ratio is 1:2, means its not 50% its 33,33% : 66.66%
    what I understood :
    1:2 ratio means to one whole is separated on 3 equal parts.
    So ratio like 1:2 is 33% : 66%
    1:1 is 50% : 50%
    1:2 is 33% : 66%
    1:3 is 25% : 75%
    etc etc
    1/2 means 50%
    1/3 means 33%
    1/4 means 25%
    1/5 means 20%

    (He said its.)

    Lets assume that this Urtica dioica leaves has a acetylcholine:resin ratio of 1:2 (which is sometime a very realistic value), meaning that half the resin is pure acetylcholine. In this case since we know that any amount of weight of acetylcholine is found in 2x that weight resin , the 10g Urtica dioica leaves will have 4g resin.

    What is correct, ratio 1:2 is 33,33: 66,66 or its 50% ?
    1/2 and 1:2 isnt same or sometime 1:2 can be expressed like 50% ?

    3.) I cant figure out how material what we use contains 10% of acetylcholine but needle resin contains 39% of acetylcholine.
    Do not forget to ratio of leaves : resin is 50% : 50%.
    OK, % of acetylcholine must be bigger by needles isolation but how almost 300% bigger but resin is just 50% of weight.

    What is number ?
    Acetylcholine is in needles.
    If acetylcholine is 10% in 10 grams of leaves how much concentraion of acetylcholine can be improved if leaves : needles is 50%:50% ?


    My brain hurts me of our conversation ,we are bad in math and thats BIG problem.Please help us or we gonna start WWIII

    BlizzO
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member slider142's Avatar
    Joined
    May 2009
    From
    Brooklyn, NY
    Posts
    72
    Odds are calculated out of a whole. 1:1 means you have 1 "amount" of substance A per 1 "amount" of substance B. An acetylcholine:resin ratio of 1:2 means you have 1 gram of acetylcholine per 2 grams of resin.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2010
    Posts
    6
    Thank you slider142, we decide to must ask 3rd person ... obviously smarter than both of us
    OK, question 1. is answered also it gives answer on question 2.

    Question 3.
    If we know to concentration of acetylcholine in leaves is 10% and we collect resin (resin is 50% of leaves weight).
    It means to concentration of acetylcholine is increased for 50% or 100% ?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Jun 2010
    Posts
    9

    The problem is not maths to most of us?? but the information

    Hi. I don't mean to be rude. But I don't think the problem, certainly with me, is math but rather the words you are using to describe the situation. There are lots of technical words that you are using such as mechanical isolation, Acetylcholine, resin, needles, nettle, material, etc.

    I have tried to break down the numbers part of it and get this:


    needles : Total
    5 : 10
    1 : 2

    needles : other plant material
    1 : 1

    acetylcholine : needle resin
    39 : 100

    acetylcholine : material
    10 : 100
    1 : 10

    leaves : resin
    1:1

    leaves : needles
    1 : 1

    Your 1 and 2 are correct.
    1/2 --> 1 : 1
    1 : 2 --> 1/3

    If you can simplify the concentration / material make up and loose the discussion it would be much simpler. With that we can help you solve the mathematics.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Jun 2010
    Posts
    6
    Hello Spaarky,

    Collected Needles are Resin.
    Leaves : Resin is same like Leaves : Needles
    Also Needles : Other plant material, is same like I said above cause other plant material are Leaves.

    Needles : Total is 1:1
    50% / 50%
    So it can not be 1:2 but 1:1

    How you got this ?
    acetylcholine : needle resin
    39:100

    39:100 is 28 % : 72%, how you got 28% acetylcholine : 72% needles when
    acetylcholine : material
    1:10

    if character ( : ) are stated for parts than 39:100 is 28:72 in percents ( % )
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Jun 2010
    Posts
    9
    Collected Needles are resin. OK

    Leaves : Resin is same like Leaves : Needles ???? huh....
    - how can you say this. when you just said needles are resin. now you say resin is leaves ?? so that means resin, leaves and needles are all the same ???? if so why do you put leaves : resin : needles ??

    39:100 -> i didnt get this. you stated this

    39:100 is not 28:72
    -------------------------------------------------------------------
    you need to state the different ratios, using consistent words. if leaves is resin than do not say both but only one. also, perhaps I am reading this incorrectly, but it appears you are using the character : for different purposes making it confusing to read. only use the : when comparing the ratio between two objects such as the ratio of apples to pears is 3 : 2

    are you able to restate the ratios, using only one word for each of the different objects / items to be compared ?

    An example of a ratio comparing a few objects might be
    There are 3 times as many apples as oranges in a basket. The ratio of the number of pears to the number of oranges is 4:3 while the number of bananas to the number of apples is 1:5. If there are 27 bananas, how many fruits are there?

    A:O
    3:1 (times by 3)
    9:3

    P:O
    4:3

    Combine the above two
    A : P : O
    9 : 4 : 3 (multiply by 5)
    45 : 20 : 15

    B:A
    1:5 (multiply by 9)
    9 : 45

    Combine all
    A : P : O : B
    45 : 20 : 15 : 9

    9units --> 27
    1unit --> 3
    total fruits is 45+20+15+9 --> 89units
    89units --> 89x3 -> 267 fruits
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Jun 2010
    Posts
    6
    Good day spaarky

    Yes, thats right Resin is nothing more than collected needles from Nettle.
    Hence that Resin is same like collected needles ... use term what you like.
    Hairs = Resin = Trichomes , that posses any plant on this world, no matter which word you use we will know what you talking about.
    I use word needle cause Nettle have hairs similar to needle.

    Here is for you about
    Resin Resin - Wikipedia, the free encyclopedia
    Nettle Nettle - Wikipedia, the free encyclopedia

    Well Ratio 39:100 should be

    39+100 = 139 equal parts
    One whole is 100%
    100 / 139 = 0,719
    0,719 is value of each part

    39 x 0,719 = 28,1
    100 x 0,719 = 71,9

    hence that
    39 : 100 is same like 28,1% : 71,9%

    100 contains 39 for 2,5 times
    71,9 contains 28,1 for 2,5 times
    so calculation is correct

    but how you got 39:100

    __________________________________

    We can calculate sugar in that your fruits .
    Sugar is in solution, but solution in plant material.
    One Apple contains 10% of sugar.
    Solution what contains sugar in Apple is 50% by weight.

    Made Juice of that Apple (that is mechanical isolation of sugar solution).
    Now how much % of sugar is in that Juice ?
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Newbie
    Joined
    Jun 2010
    Posts
    9
    As my previous comment, I entered 39:100 as an example which was in your first post. So I didn't derive 39:100, I just took it from your post trying to understand your comments.

    I would love to help however, I really do not understand your English. It is not necessary to understand what Resin, Needles, etc. is. Just the basic comparisons in ratios, fractions, or percentages. If you could just write out your facts in A,B,C, etc. without the references to plants and the materials, it would be much simpler.

    Some simple rules
    A : B --> total parts A+B

    Fractions to Ratio
    If A is 1/3 of B
    A:B
    1:3
    If A is 1/3 of total and the rest is B
    A : B
    1 : 2

    If there is 20% of A in a solution then
    A : Solution
    20 : 100
    1:5

    If A is 17% less than B
    A:B
    17:100

    If you have a concentration consisting of A+B such that A is 35% then
    A:B
    35 : 65
    7:13

    If you have multiple comparisons, you must make the item that is repeated the same
    eg A is to B 5:2 and B is to C 3:2 then
    A : B
    5 : 2

    B : C
    3 : 2

    Make B the same
    A : B
    15:6
    B:C
    6:4
    Combine them
    A:B:C
    15:6:4
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Newbie
    Joined
    Jun 2010
    Posts
    6
    Hi spaarky
    First sorry for my bad eng

    I will repeat myself one more time, I didnt write 39:100 you said that and you said that twice already.
    Please quote me about 39:100.
    My words are about 39%

    Quote Originally Posted by slider142
    Odds are calculated out of a whole. 1:1 means you have 1 "amount" of substance A per 1 "amount" of substance B. An acetylcholine:resin ratio of 1:2 means you have 1 gram of acetylcholine per 2 grams of resin.
    39:100 in parts and 39% isnt same, or me & slider124 are wrong.

    Quote Originally Posted by spaarky
    Your 1 and 2 are correct.
    1/2 --> 1 : 1
    1 : 2 --> 1/3
    Quote Originally Posted by BlizzO
    2.)I told him to ratio is 1:2, means its not 50% its 33,33% : 66.66%
    what I understood :
    1:2 ratio means to one whole is separated on 3 equal parts.
    So ratio like 1:2 is 33% : 66%
    1:1 is 50% : 50%
    1:2 is 33% : 66%
    1:3 is 25% : 75%
    etc etc
    1/2 means 50%
    1/3 means 33%
    1/4 means 25%
    1/5 means 20%
    I never said 1:2 and 1/2 is same ... its totally different.
    What I understood slider124 agree with me.

    Tell me for what you use character [ : ] but for what [ / ] , cause they doesnt mean same.
    What is Mathematical Symbols? - Definition from Whatis.com - see also: math symbols, Fast Reference for Mathematical Symbols
    Follow Math Help Forum on Facebook and Google+

  10. #10
    Newbie
    Joined
    Jun 2010
    Posts
    9
    Ratios, fractions, percentages are all the same. They are just different visual representations.

    Eg. IF A is 50% of B then
    A:B
    1:2
    Other the other hand if A is 50% of the total and the rest are B then
    A:Total
    1:2
    A:A+B
    1:2
    A:B
    1:1

    When converting percentage of ratio, you need to consider what is the "base" you are comparing to. The base is 100%

    So in your case you mentioned "resin contains 39% of acetylcholine"
    acetylcholine : resin
    39:100

    So yes, 39% is 39:100 parts. It just depends on what you are comparing against.

    For fractions and ratios.
    Yes 1:2 is the same as 1/2. BUT again it depends on how you compare:
    If A is 1/2 of B means A to B is 1:2
    If A is 1/2 of the total and B is the rest then A to B is 1:1.

    : is the symbol for ratios. eg. The ratio of red to blue is 2:1 (two to one)
    / is the symbol for fraction (divide). Depending on which country you are from / means fraction and other countries you use a horizontal / instead of a slanted line. However, here in this forum a horizontal line is not possible.


    So to summarize, it is not a matter of simply 1:2 or 33.3%, it is a matter of the ratio of what to what in context. This is why in my original post I asked you to list out in single words consistently the materials being discussed as it appeared as though you were using multiply words for the same meaning (ie needles, leaves, resin, etc). Which, while easy for you to understand being an expert in the topic, for the reader, does not mean much and as a result we will confuse the content from the math.
    Follow Math Help Forum on Facebook and Google+

  11. #11
    Newbie
    Joined
    Jun 2010
    Posts
    6
    Spaarky,

    39/100 is 39%
    39:100 is 28,1% : 71,9%

    / this is fraction
    : this is parts

    Math Forum - Ask Dr. Math

    39 is 39 parts of an substance in one whole, 100 is 100 parts of an substance in that same one whole.
    These substances together make one whole , that one whole have 139 equal parts.

    if 39:100 is 39%
    what is 39:124 ?

    I never said to we calculate percentage between ratios, its always of one whole....how much part A is in one whole but how much part B ... is it part A 22% of part B was never a question.


    Coctail
    A = Juice
    B = Gin

    A : B
    1 : 2

    How big percentage of Gin is in that Coctail ?

    Please read bottom line and tell me which of that two quote is wrong ?
    _______________________

    Quote Originally Posted by spaarky
    If A is 1/2 of B means A to B is 1:2
    .
    Quote Originally Posted by spaarky
    Your 1 and 2 are correct.
    1/2 --> 1 : 1
    1 : 2 --> 1/3
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. percent
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 3rd 2010, 03:19 PM
  2. percent
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 26th 2010, 01:23 PM
  3. percent
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 25th 2010, 11:11 AM
  4. Integration by parts, basic,.. I think!
    Posted in the Differential Equations Forum
    Replies: 4
    Last Post: April 27th 2009, 12:09 AM
  5. percent
    Posted in the Algebra Forum
    Replies: 1
    Last Post: April 15th 2008, 08:15 PM

Search Tags


/mathhelpforum @mathhelpforum