If a% is the first discount and b% is the second discount on the marked price of an article, then an equivalent single discount percentage is given by:

A number is first increased by 10% and then decreased by 10%. The number so obtained is 80 less than the original number. The original number is

Dimensions of a cubical shape room are increased by 10%. What increase will be there in its floor area?

A’s and B’s salaries are respectively 40% and 70% rupees more than C’s salary. What is the ratio of B’s salary to A’s salary?

The price of a mobile phone was 18,000 last year. It has increased by 15$$\frac 34$$​% this year. What is the current price?

If the radius of the base of a right circular cylinder is decreased by 27% and its height is increased by 165%, then what is the percentage increase (closest integer) in its volume?​

The area of a triangle is constant. Find the percentage increase in its perpendicular height if the base of the triangle is decreased by 20%.

By how much is 65% of 65 greater than 2/5 of 25?

The length of a rectangle increases by 15%. Find the percentage decrease in the breadth in order to maintain the area constantly. (Rounded off to 2 decimal places)

The price of fuel decreases by 15%, 25% and 35% in three successive months, but increases by 40% in the fourth month. What is the percentage increase/decrease in the price of fuel in the fourth month as compared to its original price?

The first and second numbers are, respectively, 35% and 45% less than the third number. The second number is what percentage of the first number?