A man spends $75 %$ of his income. If his income is increased by $20 %$ and he increased his expenditure by $10 %$ . By what $%$ will saving increased?

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Solution

Let his income be Rs. $100$ Expenditure $=$ Rs. $75$
Now Income is increased by $20 %$
Thus, new income $= 120$
Expenditure is increased by $10 % =$ $\frac{75 \times 110}{100} =$ Rs. $82.50$
Saving $= 120 - 82.50 = 37.50$
Earlier saving $= 100 - 75 = 25$
Increase in saving $=$ $\frac{37.50 - 25}{25} \times 100 = 50 %$

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A man spends 75% of his income. If his income is increased by 20% and he increased his expenditure by 10%. By what % will saving increased?

Let his income be Rs. 100 Expenditure = Rs. 75Now Income is increased by 20%Thus, new income =120Expenditure is increased by 10%= 75×110100= Rs. 82.50Saving =120−82.50=37.50Earlier saving =100−75=25Increase in saving = 37.50−2525×100=50%

A man spends $75 %$ of his income. If his income is increased by $20 %$ and he increased his expenditure by $10 %$ . By what $%$ will saving increased?