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The cost price of 12 pens is equal to the selling price of 9 pens. Find the profit percentage.

The population of a district is 383000, out of which 221000 are males. 58% of the population is literate. If 58% males are literate, then what percentage of females are literate ?

A tank contains 3,800 milliliters of water. If its full capacity is 0.008 kiloliters, what percentage of the tank is empty?

The price of an article increases from ₹ 500 to ₹ 650 . What is the percentage increase?

A solid metallic sphere of radius R is heated so that its radius increases by $20\%$. Find the approximate percentage increase in its volume.

On selling 15 articles, a trader gains the cost price of 5 articles. What is his profit percentage?

If the breadth of a rectangular field is increased by 20%, then by what percentage should its length be reduced so that the area of the field remains constant ?

A retailer buys 12 pairs of shoes for ₹22,400. His overhead expenses are ₹1,600. If he earns ₹28,500 from the sale of these 12 pair of shoes, determine his profit percentage.

The population of a district is 384000, out of which 192000 are males. 69% of the population is literate. If 53% males are literate, then what percentage of females are literate?

The population of a district is 333000, out of which 213000 are males. 71% of the population is literate. If 71% males are literate, then what percentage of females are literate?

An article is bought for ₹5,000 and sold for ₹6,200. Find the profit percentage.

The population of a district is 372000, out of which 168000 are males. 20% of the population is literate. If 20% males are literate, then what percentage of females are literate ?

The population of a district is 385000, out of which 168000 are males. 52% of the population is literate. If 21% males are literate, then what percentage of females are literate?

A book was purchased for ₹1,020 and sold for ₹1,224. Find the profit percentage.

A solid ball is placed inside a cube such that it touches all six faces. What percentage of the cube's volume is occupied by the ball?

Out of her total monthly income, a woman spends 50% on household expenses and 20% on savings. The remaining is spent on other items. What percentage of her income is spent on these other items?

The population of a city increases by 30% in the first year and decreases by 25% in the second year. What is the net percentage change after 2 years?

The difference between the selling price and the cost price of an article is ₹600. If the profit percentage is $30\%$, what is the selling price of the article?