Question

The numerator and denominator of a rational no. are in the ratio 3:4. If the denominator is increased by 3, the ratio becomes 3:5. Find the rational no.

Answer 1

The numerator and denominator of a rational number are in the ratio 3:4.If the denominator is increased by 3,the ratio becomes 3:5.Find the rational number. 
**
let d=denominator
let n=numerator
..
n/d=3/4
3d=4n
..
n/(d+3)=3/5
3d+9=5n
3d=5n-9
..
4n=5n-9
n=9
d=4n/3=36/3=12
rational number: 9/12 

Answer 2

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