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Math Help - Numerator and denominator

  1. #1
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    Question Numerator and denominator

    1)What no. should be subtracted from both numerator and denominator of the fraction 29/37 to make it equal to 5/7 ?

    Solution

    I think 4 should be subtracted from numerator but if 4 is subtracted from 37 it will not give answer as 7 after cutting.

    2)After spending 5/8 of money on marketing, a lady had $10.50 left. How much she had at the start ?

    Solution

    10.50*(8/5)=$16.8 right ?
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  2. #2
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    Re: Numerator and denominator

    Quote Originally Posted by haftakhan View Post
    1)What no. should be subtracted from both numerator and denominator of the fraction 29/37 to make it equal to 5/7 ?
    Solve \frac{29-x}{37-x}=\frac{5}{7}~.
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  3. #3
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    Re: Numerator and denominator

    answer is 9
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    Re: Numerator and denominator

    Quote Originally Posted by haftakhan View Post
    ...

    2)After spending 5/8 of money on marketing, a lady had $10.50 left. How much she had at the start ?

    Solution

    10.50*(8/5)=$16.8 right ? ..... No
    If she's spend \frac58 of her money then the rest would be \frac38 of her money:

    \frac38 \cdot m = \$10.5

    where m denotes the amount of money at the start of the shopping tour.
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