If the price of sugar is increased by 25% today, by what percent should it be decreased tomorrow to bring the price back to the original ?

A number increased by 15% becomes 391. Find the number.

Two numbers are respectively 20 percent and 50 percent more than a third number. What percent of the first number is the second number?

Two numbers are respectively 20 percent and 50 percent of a third number. What percent of the first number is the second number ?