Percentages · Question 7 · Medium
The price of petrol rises by 20% and a family cuts its petrol consumption by 10%. What is the change in its petrol expenditure?
- 10% increase
- 8% decrease
- 2% increase
- 8% increase
Answer and explanation
Answer: D. 8% increase
Explanation: Expenditure = price × consumption. New factor = 1.2 × 0.9 = 1.08, so expenditure rises by 8%.
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