Question

9. After an increment of 5 in both the numerator and
denominator, a fraction changes to 6/7. Find the
original fraction
(a) 5/12
(b) 7/9
(c) 2/5
(d) 3/8​

Answer 1

Step-by-step explanation:

Let the numerator be N and the denominator be D, so that fraction is N/D.

After an increase of 7 in both numerator as well as the denominator, the fraction changes to 3/4

(N+7)/(D+7) =3/4

3D-4N=7

Two variables and one equation. Hence more than one solution possible.

Possible solutions (N,D) are:

(2,5) (5,9), (8,13), (11,17), (14,21), (17,25), (20,29), (23, 33) so on

In general,

(2+3a, 5+4a) for a= 1, 2, 3,

Here are some results upto a = 25

Answer 2

Answer:

option b 7/9

Step-by-step explanation:

you can clearly tell that the information is insufficient so go through the option

refer the photo I've attached above