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 10% of 80, calculate 80 x 0.10 = 8.

Front

What is 10% of 80?

Back

8

Front

What is 25% of 400?

Back

100

Front

How do you find the percentage of a group?

Back

To find the percentage of a group, divide the part by the whole and multiply by 100. For example, if 150 out of 200 students passed, the percentage is (150/200) x 100 = 75%.

Front

What percentage of 200 students passed if 150 passed?

Back

75%.

Front

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

Back

$6.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the top number (numerator) by the bottom number (denominator) and multiply by 100.

Front

What is 30% of $20?

Back

$6.

Front

If a shape is 65% shaded, what does that mean?

Back

It means that 65 out of every 100 equal parts of the shape are shaded.