alleryThe price of a TV is reduced by 20% in a sale. To restore it to the original price, by what percent should the sale price be raised?
A25%
B20%
C30%
D33.33%
Answer & Solution
Correct answer: A. 25%
1. Let original price be 100. After 20% off: 80.
2. To go from 80 back to 100, increase = 20.
3. Percent increase on 80 = (20 / 80) * 100 = 25%.
4. So the sale price must be raised by 25%.
_Source: SSC CGL Quantitative Aptitude (Percentages), R.S. Aggarwal style and standard practice_
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