Results 1 to 6 of 6

Math Help - Help with coverting from percent to whole number please

  1. #1
    Junior Member
    Joined
    Jan 2009
    Posts
    25

    Help with coverting from percent to whole number please

    Hey guys i need quick man help, please

    Calculate the following
    a, what is 30% of 45
    b,what is 20% of 80

    please help me.. i forgot how to do over the holidays.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by frankpham12 View Post
    Hey guys i need quick man help, please

    Calculate the following
    a, what is 30% of 45
    b,what is 20% of 80

    please help me.. i forgot how to do over the holidays.
    some vocabulary:

    "percent" means "out of 100", or "over 100"

    "is" means "equals"

    "of" in math usually means "multiply"

    so to answer part (a) for instance, we would say:

    "30% of 45 is ..." which translates to " \frac {30}{100} \times 45 = \cdots"

    so now you can find that. what do you get for the answer? can you do the second one?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by frankpham12 View Post
    Hey guys i need quick man help, please

    Calculate the following
    a, what is 30% of 45
    b,what is 20% of 80

    please help me.. i forgot how to do over the holidays.
    (30/100) x 45

    (20/100) x 80

    You will probably need a calculator to do the arithmetic.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Jan 2009
    Posts
    25
    Quote Originally Posted by mr fantastic View Post
    (30/100) x 45

    (20/100) x 80

    You will probably need a calculator to do the arithmetic.
    thanks a lot
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Dec 2008
    Posts
    17
    Quote Originally Posted by frankpham12 View Post
    Hey guys i need quick man help, please

    Calculate the following
    a, what is 30% of 45
    b,what is 20% of 80

    please help me.. i forgot how to do over the holidays.
    a)  <br />
= 0.3 \times 45 <br />
= 3 \times 4.5 <br />
= 9 + 4.5 <br />
= 13.5<br />

    b) Since 20% = 0.2 x100
    20% is a fifth of full value.

    Thus

    80/5 = 16
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Junior Member
    Joined
    Jan 2009
    Posts
    25
    Quote Originally Posted by RossBrons View Post
    a)  <br />
= 0.3 \times 45 <br />
= 3 \times 4.5 <br />
= 9 + 4.5 <br />
= 13.5<br />

    b) Since 20% = 0.2 x100
    20% is a fifth of full value.

    Thus

    80/5 = 16
    thanks for ur help but the others already explained ty
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] [SOLVED] Percent of a Number
    Posted in the Algebra Forum
    Replies: 6
    Last Post: November 4th 2013, 01:01 PM
  2. percent
    Posted in the Algebra Forum
    Replies: 1
    Last Post: April 17th 2011, 08:48 AM
  3. Coverting to a single logarithm
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 1st 2010, 11:35 AM
  4. Replies: 5
    Last Post: October 16th 2008, 12:56 PM
  5. percent of number
    Posted in the Algebra Forum
    Replies: 12
    Last Post: April 7th 2008, 09:02 AM

Search Tags


/mathhelpforum @mathhelpforum