Quantitative Aptitude • Percentage, Profit & LossMedium
By selling a wristwatch for ₹720, a store owner loses 20%. What was the cost price?
A. ₹864
B. ₹900✓ Correct Answer
C. ₹740
D. ₹576
💡 Solution & Explanation
A 20% loss means the selling price is 80% of the cost price. So cost price = ₹720 × 100 ÷ 80 = ₹900. Check: 20% of ₹900 is ₹180, and ₹900 − ₹180 = ₹720. Adding 20% to ₹720 gives ₹864, which is wrong because the loss is a percentage of the cost, not of the selling price.
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