A number is first increased by 10% and then it is further increased by 20%. The original number is increased altogether by:

If (x+20)% of 250 is 25% more than x% of 220, then 10% of (x + 50) is what per cent less than 15% of x?

If the duty on an article is reduced by 40% of its present rate by how much per cent must its consumption increase in order that the revenue remains unaltered?

Joseph's income is decreased by 10%, by what percent the new income has to be increased to bring his income back to the previous level?

In a class, 60% speak Hindi and 70% speak English. If 28% of the students can’t speak any of the two languages, then what % of the students in the class can speak both the languages?

If the price of sugar is increased by 20%, then by what percent should a housewife reduce its consumption so that no expenditure on it increases?

Two numbers are, respectively, 10% and 25% more than the third number. The ratio of the two numbers is:

The difference of two numbers is equal to 20% of the larger of the numbers. If the smaller number is 40, then find the larger number