Original income= I
.25I=Savings original
.15(I*1.20)=new savings.
percent increase= (New-old)/old * 100
= (.18I-.25I)/.25I * 100
It appears his savings decreased.
A man spend 75% of his income. when his income is increse by 20%. He increse his expenditure 10% . By what percent are his saving increse ?
1 answer