Percent Proportions- 7th grade

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 is the formula for finding the part in a percent problem?

Back

The formula is: Part = Percent × Whole.

Front

What is the formula for finding the whole in a percent problem?

Back

The formula is: Whole = Part ÷ Percent.

Front

If 25% of a number is 50, what is the number?

Back

The number is 200, because 50 ÷ 0.25 = 200.

Front

What does 'of' mean in percent problems?

Back

'Of' refers to the whole amount in a percent problem.

Front

What does 'is' mean in percent problems?

Back

'Is' refers to the part in a percent problem.

Front

How do you convert a fraction to a percent?

Back

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

Front

What is 90% of 250?

Back

90% of 250 is 225.

Front

If 35 boys represent 5% of the total enrollment, how do you find the total enrollment?

Back

Total enrollment = Part ÷ Percent = 35 ÷ 0.05 = 700.