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If the cost price of 15 tables be equal to the selling price of 20 tables, the loss per cent is :
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- 20%
- 30%
- 25%
- 37.5%
Correct Option: C
Let the cost price of one table = y
∴ Cost price of 15 tables = 15y and cost price of 20 tables = 20y
According to the question ,
Selling price of 20 tables = cost price of 15 tables = 15y
∴ Loss = 20y – 15y = 5y
| ∴ Loss% = |  | 5y × 100 |  | = 25% | |
| 20y |
Second method to solve this question :
Here, p = 15, q = 20
| Loss% = | × 100 | q |
| Loss% = | | 15 - 20 | | × 100 | |
| 20 |
| Loss% = | × 100 = –25% (–ve sign shows loss) | 20 |
Hence , Loss% = 25%
