A cloth merchant bought 35 shirts, each at a price of Tk. 280. He sold each of them for Tk. 308. Find his percentage profit.

Question: A cloth merchant bought 35 shirts, each at a price of Tk. 280. He sold each of them for Tk. 308. Find his percentage profit.

Solution:
The profit percentage remains same for one unit as well for all the units. Thus the calculations should be done for one unit only.
CP = Tk. 280
SP = Tk. 308
Profit = 308 - 280 = 28.

Profit percentage = (28/280) × 100 = 10%