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Math Help - percents..

  1. #1
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    Exclamation percents..

    How many gallons of pure alcohol should be added to 63 gallons of a 32% solution to make it 37% alcohol?
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  2. #2
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    Quote Originally Posted by outlandish View Post
    How many gallons of pure alcohol should be added to 63 gallons of a 32% solution to make it 37% alcohol?
    63 gallons of 32% alcohol solution contains 63*0.32=20.16 gallons.

    Add x gallons of pure alcohol, then the concentration is (x+20.16)/(63+x)=0.37.

    Now solve for x.

    RonL
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