Percentage of a Number

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 x 0.20 = 10.

Front

What does '40% off' mean?

Back

'40% off' means that the price is reduced by 40% of its original amount. For example, if an item costs $100, a 40% discount means you save $40.

Front

If an item costs $80 and is 25% off, how much do you save?

Back

You save $20. (25% of $80 = 0.25 x 80 = 20)

Front

What is 10% of 200?

Back

20. (10% of 200 = 0.10 x 200 = 20)

Front

How do you find the original price after a discount?

Back

To find the original price, divide the sale price by (1 - discount rate). For example, if the sale price is $60 after a 20% discount, the original price is $60 / 0.80 = $75.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 80 is 40.

Front

If you have a coupon for 15% off a $40 purchase, how much do you save?

Back

You save $6. (15% of $40 = 0.15 x 40 = 6)

Front

What is 80% of 100?

Back

80. (80% of 100 = 0.80 x 100 = 80)

Front

How do you convert a percentage to a decimal?

Back

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