Question

The price of rice has increased by 20%. Lalu has decided to spend only 8% more than what he initially did on buying rice. What is the percentage decrease in Lalu's rice consumption?​

Answer 1

Let the initial price of Lalu be Rs. 100 per unit and Lalu's consumption be 10 units.

∴ Initial amount spent = 100 × 10 = Rs. 1,000

New price of rice = 120% of 100 = Rs. 120 and new total amount spent = 108% of 1000 = Rs. 1,080

∴ New consumption = 1080/120 = 9 units

∴ Decrease in consumption = 1 unit

∴ % decrease = 1/10 × 100 = 10%

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