Ratio of incomes of A:B:C=7:9:12 Ratio of spending of A:B:C=8:9:15 Let incomes of A,B&C=7x,9x&12x respectively Let spending of A,B&C=8v,9y&15y respectively According to the question, 7x8y=
1
4
×7x⇒7x−
7x
4
=8y
21x
4
=8y→
x
y
=
32
21
Saving of A=7×32−8×21=56 Saving of B =9×329×21=99 Saving of C=12×32−15×21=69 Ratio of saving of A:B:C=56:99:69