A t-shirt marked at Tk. 400 is sold for Tk. 320. The rate of discount is-

Question: A t-shirt marked at Tk. 400 is sold for Tk. 320. The rate of discount is-

Solution:
Given,
Marked price = Tk. 400
Selling price = Tk. 320

Discount = Tk. (400 - 320)
= Tk. 80
∴ Discount Rate = (80/400) × 100
= 20%