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If the selling price of an article is 85% of its marked price and the cost price is 75% of the marked price, what is the profit percentage?

A bookshop advertises: "Buy 3 books and get the 4th at 40% discount." If the marked price of each book is ₹500 and all books are priced the same, what is the effective percentage discount on the total purchase?

An angle of $\frac{2\pi }{3}$ radians represents what percentage of a full circle?

A container has 100 litres of a mixture of acid and water in the ratio 3 : 2. 10% of the mixture is taken out and replaced with water. This operation is repeated once more. What is the final percentage of acid in the mixture?

P, Q, and R invest ₹16000, ₹20,000, and ₹24,000 respectively for a year. What percentage of the total profit will R get?

By selling a watch at 50% of its marked price, a shopkeeper loses 20 %. What would have been his profit percentage if he had sold it at 90% of the marked price?

The cost price of a TV set is Rs 11000, and its marked price is Rs 14000. If the shopkeeper sells it at a gain of $20\%$, then what is the percentage rate of discount offered by him?

If the surface area of a sphere is increased by 69%, by what percentage does the volume of the sphere increase?

A mixture containing 30% alcohol is mixed with another mixture containing x% alcohol in the ratio 5 : 4. If the percentage of alcohol in the final mixture is $22\%$, find the value of x .

A shopkeeper bought 100 shirts. He bought 40 shirts at Rs. 500 each and the rest at Rs. 800 each. He had to pay a transportation charge of 5% on the total purchase price. He sold 30 of the cheaper shirts at a 20% profit and the remaining cheaper ones at a 10% loss. All the expensive shirts were sold at a $10\%$ profit. What is his approximate overall profit percentage?

A retailer sells a product for ₹X, incurring a loss of 20%. During a sale, he marks up the product by 35% on the cost price and provides a flat discount of $30\%$ on the marked price. What is the percentage profit or loss for the retailer during the sale?

A dishonest shopkeeper professes to sell grains at the cost price, but he uses a weight of 920 gm for 1 kg weight. Find his gain percentage (round up to two decimal places).

Three successive discounts of 15%, 20% and 25% are given. What will be the net discount in percentage ?

A candy shop owner buys three kinds of candies: red, yellow, and green. Red candies are purchased at 3 for ₹15, yellow candies at 4 for ₹18, and green candies at 5 for ₹22. He mixes them in the ratio 1 : 1 : 2. He sells all the mixed candies at 3 for ₹20. What is his approximate gain or loss percentage?

A car dealer sold three cars, A, B, and C, whose selling prices were in the ratio 5 : 4 : 6. He made a profit of 50% on car A, a loss of 10% on car B, and an equal loss (no profit or loss) on car C. What was his approximate profit or loss percentage on the total transaction?

A ring-shaped metallic sheet has outer and inner radii 14 cm and 7 cm. What percentage of the full circle's area is the ring?

A fruit seller buys three varieties of mangoes. The first variety is bought at 8 for ₹20, the second at 10 for ₹24, and the third at 4 for ₹10. He mixes them in the ratio 2 : 3 : 1 respectively. If he sells all the mangoes at 6 for ₹14, what is his approximate gain or loss percentage?

If the height of a right prism is increased by 60% and base area remains the same, what is the percentage increase in volume?