Question 57
Sonu saves 15% of her income. If her income increases by 20% and she still saves the same amount as before, then what is the percentage increase in her expenditure? (correct to one decimal place)
Solution
Let the initially income of Sonu be Rs.100.
saving = 15%
Expenditure = 100 - 15 = 85%
Saving = 100 -85 = Rs.15
Expenditure = 85% of 100 = Rs.85
Income after increment = 100 $$\times \frac{120}{100}$$ = Rs.120
Saving = 15
Expenditure = 120 - 15 = 105
Increment in expenditure = 105 - 85 = Rs.20
Percentage Increment in expenditure = $$\frac{20}{85} \times$$ 100 = 23.52%
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