The ratio of expenditure and savings of a woman is 3 ∶ 1. If his income and expenditure increase by 15% and 10% respectively, find the percentage change in his savings.
1
30%
2
20%
3
35%
4
25%
The ratio of expenditure and savings of a woman is 3 ∶ 1. If his income and expenditure increase by 15% and 10% respectively, find the percentage change in his savings.