Percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What does it mean to find 'X is what percent of Y'?

Back

To find 'X is what percent of Y', divide X by Y and then multiply by 100. For example, to find what percent 10 is of 40, calculate (10/40) * 100 = 25%.

Front

What is 25% of 200?

Back

50

Front

If 30 is 60% of a number, what is the number?

Back

50 (because 30 is 60% of 50).

Front

What is the formula to find the percentage increase?

Back

Percentage Increase = ((New Value - Original Value) / Original Value) * 100.

Front

What is the formula to find the percentage decrease?

Back

Percentage Decrease = ((Original Value - New Value) / Original Value) * 100.

Front

What is 40% of 80?

Back

32

Front

If 15 is 10% of a number, what is the number?

Back

150 (because 15 is 10% of 150).

Front

What is 75% of 120?

Back

90