# Numerator and denominator

• Jun 17th 2011, 09:00 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, 09:06 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 $\displaystyle \frac{29-x}{37-x}=\frac{5}{7}~.$
• Jun 17th 2011, 09:11 AM
haftakhan
Re: Numerator and denominator
• Jun 17th 2011, 09:38 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 $\displaystyle \frac58$ of her money then the rest would be $\displaystyle \frac38$ of her money:

$\displaystyle \frac38 \cdot m = \$10.5\$

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