Morshed buys an article for 20% less than its value and sells it for 20% more than its value. His gain or loss percentage is-

Question: Morshed buys an article for 20% less than its value and sells it for 20% more than its value. His gain or loss percentage is-

Solution:
Let, the value of an article is x taka

Buying price = x - 0.2x
= 0.8x taka

Selling price = x + 0.2x
= 1.2x taka

Profit = 1.2x - 0.8x = 0.4x taka

Profit percentage = (0.4x/0.8x) × 100%
= (4/8) × 100%
= 50%