Results 1 to 6 of 6

Math Help - Manipulating percentages.

  1. #1
    Newbie
    Joined
    Aug 2011
    Posts
    3

    Manipulating percentages.

    Hi,

    I appreciate any help you can give to this problem i have.

    the end value must be no more than 100%

    a = 70%
    b = 10%
    c = 10%

    if i add all the values together i get 90%, which leaves 10%. this value CANNOT exceed a value that is being changed but the end value must add upto 100%

    i want to change c to 20% so it all adds up to 100% but heres the problem...

    i cant change c to 20% because the the value i got from adding all of the values together and taking away 100% is 10% and 20% is more than 10%

    your help is appreciated
    Last edited by mr fantastic; August 18th 2011 at 07:59 PM. Reason: Re-titled.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4

    Re: Problem

    Quote Originally Posted by iamjonny View Post
    Hi,

    I appreciate any help you can give to this problem i have.

    the end value must be no more than 100%

    a = 70%
    b = 10%
    c = 10%

    if i add all the values together i get 90%, which leaves 10%. this value CANNOT exceed a value that is being changed but the end value must add upto 100%

    i want to change c to 20% so it all adds up to 100% but heres the problem...

    i cant change c to 20% because the the value i got from adding all of the values together and taking away 100% is 10% and 20% is more than 10%

    your help is appreciated
    Please post this with the original wording of the problem and any contextual material.

    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Aug 2011
    Posts
    3

    Re: Problem

    Hi,

    Sorry? I didn't understand, i think i've worked it out now.. Please could someone check, you may then understand what im trying to accomplish.


    m = 100
    a = 70
    b = 10
    c = 10

    v = ((a + b + c) * 2)
    y = (v - m)
    x = (m - y)

    x should = 20
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Aug 2011
    Posts
    3

    Re: Problem

    No its still not working, I tried the values,

    a = 70
    b = 5
    c = 5

    and as the explanation in my first post, i cannot change 70 to 80 as the value i get back for the values above is, 40 (of which is above 80).. this is a complicated problem!
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Aug 2011
    From
    Omagh
    Posts
    55

    Re: Problem

    with your given equations for v, y and x

    x does equal 20

    What was the original question, what were you given, what were you asked to find?
    Don't just give what you think is relevant, give the whole question.

    Pro
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4

    Re: Problem

    Quote Originally Posted by iamjonny View Post
    Hi,

    Sorry? I didn't understand, ....
    What I (and Procyon) meant was that we have no idea what your question is from what you posted. Now try again to post what you were asked.

    CB
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Manipulating inequalities
    Posted in the Pre-Calculus Forum
    Replies: 10
    Last Post: October 8th 2011, 08:43 PM
  2. manipulating limsup
    Posted in the Differential Geometry Forum
    Replies: 1
    Last Post: August 20th 2011, 05:28 AM
  3. trig manipulating
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: May 19th 2009, 07:59 PM
  4. Manipulating Fractions
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 15th 2008, 01:00 PM
  5. manipulating series
    Posted in the Calculus Forum
    Replies: 1
    Last Post: April 28th 2008, 08:24 PM

Search Tags


/mathhelpforum @mathhelpforum