Percentages of quantities

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 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 then multiply by 100.

Front

What is 50% of a number?

Back

50% of a number is half of that number.

Front

How do you find 10% of a quantity?

Back

To find 10% of a quantity, divide the quantity by 10.

Front

What is 25% of £100?

Back

£25.

Front

How do you calculate 40% of a number?

Back

To calculate 40% of a number, multiply the number by 0.4.

Front

What is 1% of £200?

Back

£2.

Front

How do you express 3/5 as a percentage?

Back

60%.

Front

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

Back

Percentage = (Part/Whole) x 100.

Front

If 450 children took part in a school play and 40% were boys, how many boys were there?

Back

180 boys.