Arithmeticmedium · Past Paper
If the price of petrol increases by 25%, by how much percent should a user reduce consumption so that expenditure remains the same?
A20%
B25%
C15%
D30%
✓ Correct Answer: A — 20%
Reduction % = [r / (100 + r)] * 100 = [25 / 125] * 100 = 20%.
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