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Math Help - Percentage

  1. #1
    Newbie
    Joined
    Feb 2007
    Posts
    9

    Unhappy Percentage

    Hi i know after reading this you might think how easy is this question but honestly i am finding it slightly hard the question is

    A football was priced at 34.00 in a sale in the sale, everything had been reduced in price by 15%. What was the original price of the ball?

    Can any kind hearted person please explain how to do this can you pls show the working also so i can understand it and NEVER FORGET IT

    Thank you
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  2. #2
    Newbie
    Joined
    Apr 2007
    Posts
    3
    Hello,

    Just remeber it algerbraically, where x is the original price ()

    34 / x = 0.85 (1 - 0.15 or 15%)

    => 34 = 0.85x

    => x = 34 / 0.85

    => x = 40

    Just remember:

    Minus the new% value from 100% (100% - 15%), make it a decimal (1 - 0.15 = 0.85) Then divide your NEW price by the decimal. (34 / 0.85)

    Simple

    the answer is 40
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