If the price of petrol increases by 25%, by what percentage must a motorist reduce consumption so that expenditure remains unchanged?
A15%
B20%
C22.5%
D25%
Explanation
Reduction percentage = [R / (100 + R)] * 100 = [25 / 125] * 100 = 20%.
Exam Relevance
- Topic: Percentages
- Subtopic: Consumption Changes
No Comments