A trader bought 10 items for 2,500 and sold them for ₹3,000. What is his profit percentage?

A shopkeeper buys an item for ₹100 and sells it for ₹120. What is his profit percentage?

A person bought a book at 3/4th of its listed price and sold it at 50% more than its listed price. What is the percentage of gain in the transaction?

A person bought an article and sold it at a profit of 20%. Had he bought it at 20% less, what would have been the profit percentage if the selling price had been the same?

Some articles were bought at 6 articles for Rs. 5 and sold at 5 articles for Rs. 6. Gain percent is:

A shopkeeper marks the price of an article 20% above the cost price. If he gives a discount of 10%, what is his profit percentage?