# Numerator and denominator

• Jun 17th 2011, 10:00 AM
haftakhan
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 ?
• Jun 17th 2011, 10:06 AM
Plato
Re: Numerator and denominator
Quote:

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

Solve $\frac{29-x}{37-x}=\frac{5}{7}~.$
• Jun 17th 2011, 10:11 AM
haftakhan
Re: Numerator and denominator
• Jun 17th 2011, 10:38 AM
earboth
Re: Numerator and denominator
Quote:

Originally Posted by haftakhan
...

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.