An article bought at 20% discount is sold at 25% profit. What is the profit or loss compared with the original price?

An article is bought at a 20% discount on the original price.

The article is sold at a 25% profit on the purchase price.

Let the original price of the article be PP.

The purchase price after a 20% discount;

= P − 20% of P = 0.8P

Article sold at 25% profit;

Selling price = 1.25 × 0.8P = 1.0P

Since, the selling price equals the original price, there is no profit and no loss when compared with the original price.