Percentage problems

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It represents how many parts out of 100 are being considered.

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 25% of 80, calculate 80 x 0.25 = 20.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 200 is 100.

Front

What is 100% of a number?

Back

100% of a number is the whole number itself. For example, 100% of 50 is 50.

Front

What does it mean to find 10% of a number?

Back

To find 10% of a number, divide the number by 10. For example, 10% of 90 is 9.

Front

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

Back

The formula is: (Part/Total) x 100 = Percentage. For example, if 20 out of 200 students are boys, the percentage of boys is (20/200) x 100 = 10%.

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, 25% as a decimal is 0.25.

Front

What is 25% of 80?

Back

25% of 80 is 20.

Front

What is 20% of 75?

Back

20% of 75 is 15.

Front

If 200 children attended a play and 40% were boys, how many girls attended?

Back

If 40% were boys, then 60% were girls. 60% of 200 is 120 girls.