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Math Help - please help

  1. #1
    Newbie
    Joined
    Sep 2006
    Posts
    3

    please help

    hi i'm having a problem to solve this problem
    It says:
    Express the sale price of a computer priced at p dollars with a 20% discount

    can anyone explain what i need to do to solve it.

    thanks
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  2. #2
    Member
    Joined
    Nov 2006
    Posts
    136
    ok so

    you have a computer which is p dollars. P could be anything like 100 or 200 etc

    now we want to find a new price which has a 20% discount.

    New price = old price - % discount

    New price = p - [ (20/100) * p ]
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  3. #3
    Member
    Joined
    Nov 2006
    Posts
    136
    and alternative method is

    1. state the problem : p is decreased by 20%
    2. 20% = 20/100 = 0.2
    3. 1-0.2 = 0.8

    the new price which is discounted by 20% is = p*0.8
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