Even after reducing the marked price of a pen by ₹28, a shopkeeper makes a profit of 15%. If the cost price be ₹280 and he sells the pen at marked price, then find his profit percent.

25%

CP = 280

SP = 280 × \(\frac{115}{100}\) = 322

MRP = 322 + 28 = 350

Profit % = \(\frac{(350 - 280)}{280}\) × 100

            = \(\frac{70}{280}\) × 100 = 25%