Question

The numerator of a fraction is 4 less than the denominator .If is is added to both it's numerator and denominator , it becomes 1\2 find the fraction ​

Answer 1

Let the fraction be a/b

Numerator= denominator-4

a=b−4⇒b−a=4

If 1 added to both numerator and denomator then fraction = 1/2

a+1/b+1= 1/2

2a+2=b+1

2a−b=−1

(2a−b)+(b−a)=4−1

a=3,b=7

Fraction= 3/7