After getting two successive discounts, a trouser with a list price of ₹300 is available at ₹210. If the second discount is 12.5% find the first discount?

We are given that the list price of the trouser is ₹300, and after two successive discounts, the final price is ₹210. The second discount is 12.5%.

Let the first discount be x%

After the first discount, the price becomes $$300\times\left(1-\dfrac{x}{100}\right)$$

After applying the second discount of 12.5%, the price becomes $$300\times\left(1-\dfrac{x}{100}\right)\times\ 0.875\ =\ 210$$

Upon solving, we get x = 20