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If the surface area of a sphere increases by 26.56%, by what percentage does its volume increase?

An investment is made in a business. In the first year it gains 30%, in the second year it loses 25%, and in the third year it gains 20%. What is the overall gain or loss percentage?

If an angle θ = 3 radians, what percentage of the full circle does it represent?

A merchant marks his goods at 200% above the cost price and offers two successive discounts of $40\%$ and $10\%$. Find the profit percentage.

A vessel contains a mixture of milk and water in the ratio $3:2$. Some quantity of the mixture is taken out and replaced by water. If the final ratio of milk to water becomes 1 : 2, what percentage of the original mixture was replaced?

A solution containing 40% of milk is mixed with another mixture containing m% of milk in equal proportions. The mixture so formed contains $55\%$ of milk. What is the value of $m$ ?

Selling price of an article is 160 percent of the value of discount. Marked price is what percent of the value of discount ?

X's salary is 50% more than Y's. If Y's salary increases by 30% and X's increases by p%, then X's new salary becomes 20% more than Y's new salary. What is the value of p?

A's salary is 25% more than B's. If B's salary increases by 30% and A's increases by y%, then A's new salary becomes 10% more than B's new salary. What is the value of y?

A flight covers $1,900\mathrm{km}$ in 4 hours. By what percent should its speed be decreased to cover the same distance in 5 hours?

There are three machines $A,B$ and C in a factory which have the same total output. The defect rate of machine $A$ is $2.5\%$ and that of $B$ is $3.2\%$. If the total defective units of all three machines is 42 and each machine has produced 500 units, then what is the defect rate of machine C?

If Ram's income is 25% more than Shyam's and Shyam earns ₹80,000, what percent less is Shyam's income than Ram's?

What percent of Rs. 500 is Rs. 75 ?

P's income is 30% less than Q's. By what percent is Q's income more than $P^{\prime }$ s?

A shopkeeper bought a bag for Rs. 150 and sold it for Rs. 195. What is the profit percent ?

What percent of 280 is 70 ?

The salary of P is $30\%$ more than the salary of Q and the salary of Q is $10\%$ more than the salary of $R$. P's salary is how much percent more than R's salary?

A metallic conical bowl with base radius 25cm and height 34cm is uniformly heated, increasing all dimensions by 10%. By how much does the volume increase?