Results 1 to 10 of 10

Math Help - Fractions and Percents

  1. #1
    Newbie
    Joined
    May 2008
    Posts
    1

    Fractions and Percents

    what is 13/40 as a percentage and a decimal
    plzz help
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    One way is to do this:

    \frac{13}{40}=\frac{x}{100}

    Cross multiply and solve for x.

    40x = 1300

    x=32.5

    So, substitute back into the expression:

    \frac{32.5}{100}

    Since percent means "per hundred",

    \frac{32.5}{100} means 32.5%

    To convert to a decimal, simply move the decimal left 2 places and drop the % sign. Thus 32.5% = .325
    Last edited by masters; May 20th 2008 at 08:28 AM.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Aug 2008
    Posts
    1

    Smile percent to fraction

    what is the answer to 70% to fraction?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member euclid2's Avatar
    Joined
    May 2008
    From
    Ottawa, Canada
    Posts
    400
    Awards
    1
    The easiest way is to simply type 13/40 into your calculator (13 divided by 40) and multiply there product (.325) by 100 =32.5%.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Sep 2007
    Posts
    528
    Awards
    1
    Quote Originally Posted by kimmy marie View Post
    what is the answer to 70% to fraction?
    A percentage is a value out of hundred.

    So, 70% is equal to \frac{70}{100}

    By dividing the numerator and the denominator by 10, This simplifies to:

    \frac{70}{100} = \frac{7}{10}
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Sep 2008
    Posts
    12
    Your answers are so clear and thoroughly explained Air, +1 rep point from me, keep up the good work
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Oct 2007
    Posts
    9

    Smile Percentage of fraction

    13/40 x 100 % = 32.5%

    To change any fraction to%, times by 100%, simple
    Follow Math Help Forum on Facebook and Google+

  8. #8
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by Parveen Kaur View Post
    13/40 x 100 % = 32.5%

    To change any fraction to%, times by 100%, simple
    You mean "times by 100", not "times by 100%", don't you? If you multiply by 100%, that's the same as multiplying by 1.
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Newbie
    Joined
    Oct 2007
    Posts
    9

    Fraction as %

    yes, 100% because you can't times the fraction with any other number except 1 (100/100)
    But your answer will be in 32.5% as you are not using 1/100 while doing your calculation.

    13/40 x 100 %
    =13/40 x 100/100
    = 32.5%
    Follow Math Help Forum on Facebook and Google+

  10. #10
    Newbie
    Joined
    Sep 2008
    Posts
    1

    maths

    A percent is a ratio whose second term is 100. Percent means parts per hundred. The word percent comes from the Latin phrase per centum, which means per hundred. In mathematics, we use the symbol % for percent.
    --------------------------------------------
    SHANON



    Viral Marketing
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: April 18th 2011, 11:01 AM
  2. percents
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 17th 2010, 12:36 PM
  3. Subtracting Percents / Fractions
    Posted in the Algebra Forum
    Replies: 7
    Last Post: February 8th 2010, 02:09 PM
  4. percents and fractions
    Posted in the Algebra Forum
    Replies: 8
    Last Post: December 3rd 2008, 03:21 AM
  5. Comparing Percents, Decimals, and Fractions
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 20th 2007, 06:19 AM

Search Tags


/mathhelpforum @mathhelpforum