SP of the book = Rs 27.50 and he gains 10% profit on it. So,
CP of the book = Rs (100/110 × 27.50) = Rs 25.
If the book is sold at Rs 25.75, the seller will make a profit of Rs (25.75 – 25.00) = Rs 0.75.
Therefore, percentage of profit = 0.75/25 × 100% = 3%.
