The cost price 15 articles is equal to the selling price of 20 articles. Find the loss percentage.

If the cost-price of 18 articles is equal to the selling price of 15 articles, then find the gain percentage?

A shopkeeper buys $500$ m of electronic wire at $50$ paise per m. He sold $50$ % of the wire at a profit of $5$ %. At what percent should the shopkeeper sell the remaining wire so as to gain $10$% on the whole transaction?

A car is sold for Rs. 85000 at a loss of 20%. What is the cost price (CP) of the car?

A shopkeeper offers discount 50% + 50% on a shirt of M.R.P Rs 800, find the selling price of the shirt.

A wholesaler sells 20 pens at the marked price of 16 pens to a retailer. The retailer sells them at the marked price. Determine the gain percent of the retailer.

A chair is sold for $\rupee 96$ at 20% loss. The cost price of the chair is