Percentage Problems Practice

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 increase a number by a percentage?

Back

Increasing a number by a percentage means adding that percentage of the number to the original number. For example, increasing 100 by 50% means adding 50 to 100, resulting in 150.

Front

How do you find the original number when given a percentage of it?

Back

To find the original number, divide the known amount by the percentage (in decimal form). For example, if 30% of a number is 60, the original number is 60 / 0.30 = 200.

Front

What is the formula to find a percentage increase?

Back

The formula for percentage increase is: ((New Value - Original Value) / Original Value) * 100.

Front

What is the formula to find a percentage decrease?

Back

The formula for percentage decrease is: ((Original Value - New Value) / Original Value) * 100.

Front

If 12% of a number is 24, what is the number?

Back

The number is 200, calculated as 24 / 0.12.

Front

If 75% of a number is 180, what is the number?

Back

The number is 240, calculated as 180 / 0.75.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100. For example, 25% becomes 0.25.

Front

What is 150% of 153 grams?

Back

150% of 153 grams is 229.5 grams, calculated as 153 * 1.5.