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A person sold an article at 20% profit on the selling price. Afterwards, when the cost price reduced by 10%, then he also reduced the selling price by 10%. His percentage of profit on cost price will be
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- 30%
- 25%
- 22.5%
- 12.5%
Correct Option: B
Here , Gain % = 20%
| Gain percent = | × 100 | S.P. |
| ⇒ 20 = | × 100 | S.P. |
⇒ S.P. = 5 (S.P. – C.P.)
⇒ 5 C.P. = 5 S.P. – S.P. = 4 S.P.
| ⇒ S.P. = | 5 | C.P. = |  | 1 + | 1 |  | C.P. | |
| 4 | 4 |
∴ Required gain percent = 25%
