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In 2001, the price of a building was 80% of its original price. In 2002, the price was 60% of its original price. By what percent did the price decrease ?
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- 15%
- 20%
- 25%
- 30%
Correct Option: C
Original price of building = Rs. 100 (let)
∴ Its price in 2001 = Rs. 80
Its price in 2002 = Rs. 60
Required percentage decrease
| = |  |  | × 100 | 80 |
| = | = 25% | 8 |
