Paper 1 · Mathematical Reasoning and Aptitude
If the price of a television set is increased by 25%, by what percentage should the new price be reduced to bring it back to the original level?
A15%
B20% ✓ Correct
C25%
D30%
Correct answer: (B) 20% — The new price should be reduced by 20%, so that is the answer.
Explanation
★The new price should be reduced by 20%, so that is the answer.
★Take the original price as 100, so after a 25 per cent rise it becomes 125.
★To return to 100, the price must fall by 25 from 125.
★The reduction percentage is 25 divided by 125, times 100.
★That equals 20 per cent.
★So the new price should be reduced by 20%.
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