70 is 25 percent of what number?

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  1. profile image42
    patterson108posted 8 years ago

    70 is 25 percent of what number?

  2. Jeffrey Neal profile image81
    Jeffrey Nealposted 8 years ago

    Do you know what 25% is? It is one fourth...one quarter of something.  How many quarters make a dollar? Four. If 70 is a quarter what does four of them equal?

    4x70=?

    c'mon, do your own homework next time.

  3. nadp profile image73
    nadpposted 8 years ago

    You can answer any percent question using the "is over of" method.  This is a proportion - an equation where one ratio equals a second ratio.  One of the proportions will always be the percent over 100. In this case that is 25/100.
    The second proportion will be the number associated with "is" in the question (in this case, 70) over the number that follows the word "of" in the question (in this case, an unknown so we represent it with a variable); 70/x

    So the proportion is 25/100 = 70/x

    To solve for the unknown (in whatever position it happend to be in for a specific problem) you cross multiply, to obtain: 25x = 100*70.
    Solving for x gives x = 7000/25 =  280.  So 70 is 25 percent of 280.
    This is a perfect example of what I was discussing in my answer to the question "Applications of algebra in real life" http://hubpages.com/question/35620/appl … real-life. 
    You may know how to answer the question "What is 25% of 100?" without using algebra;  or maybe even "What is 25% of 280?"  But when the question is turned around as this one was, you're at a loss as to how to find the answer.  Well, as I always say (not really, but it sounds good ), Algebra to the rescue!

  4. dabeaner profile image55
    dabeanerposted 8 years ago

    Is this a serious question?  Most probably not.  Patterson has 0 hubs (as of 2010-02-05) since joining two weeks ago.  The question is such an elementary algebra problem, I am not even going to address it, even though I was tempted at first.  Jeffrey Neal and nadp are both correct, though nadp's response is rather convoluted.

  5. profile image45
    suruchishobhaposted 8 years ago

    Let's assume that the number is X.
    Then,

    25% of X = 70

    or, X  * 25/100 = 70

    or, X=70 * 100/25
    or,X = 280.

    For more help of your math problems visit to www.excellup.com

    1. gmwilliams profile image84
      gmwilliamsposted 4 years agoin reply to this

      ++++++++

  6. profile image50
    heartnet04posted 8 years ago

    280..
    just simple quest,,
    70 is 25% from X which X is 100%..
    so X is 100%/25% * 70..
    ta daaaa 280

    1. gmwilliams profile image84
      gmwilliamsposted 4 years agoin reply to this

      Best answer! Bingo!

  7. Dressage Husband profile image78
    Dressage Husbandposted 3 years ago

    280! 25% is equivalent to 1/4 of the whole therefore 70 X 4 = 280!

 
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