He then sold it for \( ₹ 67500 \). Find his gain or loss per cent 3. A bookseller bought a book for \( ₹ 15 \) and spent ₹ 5 on its binding. He sold it for \( ₹ 24 \) Find his 2 ., per cent. 4. Br selling a fan for ₹ 810 , a dealer makes a profit of ₹ 60 . What is the cost price of the fan? What.

To find the gain or loss percent in any transaction, you can use the formula: \(\text{Gain or Loss Percent} = \left(\frac{\text{Gain or Loss}}{\text{Cost Price}}\right) \times 100\). For the first scenario, if the selling price is ₹ 67500, you need to know the cost price to find the gain or loss. For the bookseller, he spent ₹ 15 on the book and ₹ 5 on binding, totaling ₹ 20 as the cost price. Selling at ₹ 24 gives a gain of ₹ 4, leading to a gain percent of \( \left( \frac{4}{20} \times 100 \right) = 20\% \). In the case of the fan, since the dealer sold it for ₹ 810 and made a profit of ₹ 60, you can determine the cost price by subtracting the profit from the selling price. So, \( \text{Cost Price} = 810 - 60 = ₹ 750 \). Knowing this allows the dealer to compute profits retroactively and refine pricing strategies in future sales. Always keep an eye on your costs, they’re the key to a thriving business!