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Math Help - Proportions

  1. #1
    VAP
    VAP is offline
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    May 2008
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    Proportions

    Hello,
    I do not know how to set-up this proportion in order to solve it:

    A radio is on sale for $89. If the sale price is 20% less than the regular price, what is the regular price?


    Thank you!
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  2. #2
    MHF Contributor
    Joined
    Apr 2008
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    1,092
    Quote Originally Posted by VAP View Post
    Hello,
    I do not know how to set-up this proportion in order to solve it:

    A radio is on sale for $89. If the sale price is 20% less than the regular price, what is the regular price?


    Thank you!
    Let the regular price (which you are solving for) be P. Then the sale price is equal to 80% of P. So the equation you want to solve is: 0.8P = 89
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