Question
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 income of Sonu be Rs.100 Savings of Sonu = 100 × (15/100) = Rs. 15 Expenditure of Sonu = 100 – 15 = Rs. 85 New income of Sonu = 100 × (120/100) = Rs. 120 If savings amount same, then new expenditure = 120 – 15 = 105 Her expenditure increased by = 105 – 85 = 20 Her expenditure increased by = 20/85 × 100 ≈ 23.5%
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