Understand percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It shows how much out of 100 something is.

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100 and add a percent sign. For example, 0.23 becomes 23%.

Front

What does 50% mean?

Back

50% means half of something. It is equivalent to 1/2.

Front

If 40% of a class are girls, what fraction of the class are girls?

Back

40% can be expressed as the fraction 40/100, which simplifies to 2/5.

Front

What is the percentage of 25 out of 100?

Back

25 out of 100 is 25%, because 25 divided by 100 equals 0.25, which is 25%.

Front

How do you find the percentage of a number?

Back

To find the percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is 76% as a decimal?

Back

76% as a decimal is 0.76, because you divide by 100.

Front

If a shape is 30% shaded, how much is not shaded?

Back

If a shape is 30% shaded, then 70% of it is not shaded.

Front

What is the percentage increase from 20 to 30?

Back

The percentage increase from 20 to 30 is 50%. This is calculated by (30-20)/20 x 100.

Front

What does it mean if something is 100%?

Back

If something is 100%, it means the whole or the entirety of it.