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 is 40% of 150?

Back

60

Front

If a shirt costs $45 and is on sale for 20% off, how much do you pay?

Back

$36

Front

What is 25% of 500?

Back

125

Front

If 40% of a group prefers one activity, what percentage prefers other activities?

Back

60% prefer other activities.

Front

How do you find the percentage decrease?

Back

To find the percentage decrease, subtract the new value from the original value, divide by the original value, and multiply by 100. For example, if the original value is 30 and the new value is 24, the decrease is (30-24)/30 * 100 = 20%.

Front

What is the formula for calculating percentage?

Back

Percentage = (Part/Whole) * 100.

Front

If 300 children attend a sports club and 40% prefer football, how many prefer football?

Back

120 children prefer football.

Front

If 30% of a class of 40 students are girls, how many girls are in the class?

Back

12 girls.