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Rahul buys a book for $ 400 and sells it for $ 500. The difference between his profit as a percentage of the buying price and then as a percentage of the selling price is
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- 25%
- 5%
- 0%
- 20%
Correct Option: B
Given that , CP of book = $ 400 and SP of book = $ 500
Profit = SP of book - SP of book = 500 - 400 = $ 100
| Profit percent at C.P. = | × 100 | Cost Price |
| Profit percent = | × 100 = 25% | 400 |
| Profit percent at S.P. = | × 100 | S.P. |
| Profit percent at S.P. = | × 100 = 20% | 500 |
∴ Required difference = Profit percent at S.P. - Profit percent at C.P.
∴ Required difference = 25 – 20 = 5%
