Percents Practice

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios and express 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 x 0.20 = 10.

Front

What is 40% of 20?

Back

8

Front

How do you find what percent one number is of another?

Back

To find what percent one number is of another, divide the first number by the second number and multiply by 100. For example, to find what percent 14 is of 20, calculate (14/20) x 100 = 70%.

Front

What is 20% of 360?

Back

72

Front

If Sarah earns $20 a day and spends 30% of it, how much does she spend?

Back

$6

Front

What is the formula to calculate the percentage increase?

Back

Percentage Increase = ((New Value - Old Value) / Old Value) x 100.

Front

What is the formula to calculate the percentage decrease?

Back

Percentage Decrease = ((Old Value - New Value) / Old Value) x 100.

Front

If 30% of a group of 60 people like caramel popcorn, how many like butter popcorn?

Back

42 people like butter popcorn.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100. For example, 1/4 = 0.25 = 25%.