Naresh sold two books for ₹ 600 each thereby gaining 20% on one book and losing 20% on the other bokk.Find his overall loss or gain per cent.

Explanation

To solve the problem step by step, we will first calculate the cost price of each book based on the profit and loss percentages, then find the total cost price, total selling price, and finally determine the overall loss or gain percentage.

### Step 1: Calculate the Cost Price of the First Book
Naresh sold the first book for ₹600 with a gain of 20%. We can use the formula for selling price (SP) in terms of cost price (CP) when there is a profit:

\[ SP = CP \times \left(1 + \frac{Profit\%}{100}\right) \]
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