Quantitative Aptitude • Percentage, Profit & LossMedium
The price of a pen is first increased by 20% and then decreased by 20%. What is the net change in its price?
A. 4% decrease✓ Correct Answer
B. 4% increase
C. No change
D. 20% decrease
💡 Solution & Explanation
Take the price as 100. After a 20% increase it becomes 120. A 20% decrease is taken on 120, which is 24, so the price becomes 96. That is 4 less than the start: a net decrease of 4%. Shortcut: an equal rise and fall of x% always gives a decrease of x²/100 %.
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