A loss of 25% is incurred in selling an item for Rs.2400. What should be the selling price if there should be a profit of 25%?

Selling price at 25% loss = Rs. 2400

Loss percentage = 25%

Desired profit percentage = 25%

​$$\text{Cost Price (CP)} = \frac{\text{Selling Price}}{1 - \frac{\text{Loss \%}}{100}}$$​​

​$$\text{New Selling Price (SP)} = \text{CP} \times \left( 1 + \frac{\text{Profit \%}}{100} \right)$$​​

​$$\text{CP} = \frac{2400}{1 - \frac{25}{100}} = \frac{2400}{0.75} = 3200$$​​

the new selling price (SP) for a 25% profit:

​$$\text{SP} = 3200 \times \left( 1 + \frac{25}{100} \right) = 3200 \times 1.25 = 4000$$​​

Thus, the selling price should be Rs. 4000.