Percentage review

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 relative sizes or to describe how much of something there is.

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 a 10% discount mean?

Back

A 10% discount means that the price is reduced by 10 out of every 100 units of currency. For example, if an item costs $100, a 10% discount would reduce the price to $90.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 45% becomes 0.45.

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100. For example, 0.75 becomes 75%.

Front

What is the formula to find the percentage of a part compared to a whole?

Back

The formula is: (Part/Whole) x 100 = Percentage. For example, if you scored 18 out of 20, the percentage is (18/20) x 100 = 90%.

Front

If a shirt costs $50 and is discounted by 10%, what is the new price?

Back

$45

Front

If a jacket originally costs $80 and is on sale for 25% off, what is the sale price?

Back

$60

Front

What is 45% expressed as a decimal?

Back

0.45

Front

If a student scores 18 out of 20 on a test, what is their score as a percent?

Back

90%.