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 a shirt costs $30 and is on sale for 25% off, how much do you save?

Back

You save $7.50. (30 x 0.25 = 7.50)

Front

What is 10% of 200?

Back

20. (200 x 0.10 = 20)

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 50% of 80?

Back

40. (80 x 0.50 = 40)

Front

If there are 200 students and 30% are girls, how many girls are there?

Back

60 girls. (200 x 0.30 = 60)

Front

What is the formula to find the percentage of a number?

Back

Percentage = (Part / Whole) x 100.

Front

If a product costs $60 and is marked up by 15%, what is the new price?

Back

$69. (60 x 0.15 = 9; 60 + 9 = 69)