Percents & Percent Proportions

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 percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (in decimal form). For example, to find 30% of 80, calculate 80 x 0.30 = 24.

Front

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

Back

The formula is: Part = Percent x Whole.

Front

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

Back

The formula is: Whole = Part / Percent.

Front

What does 'of' represent in percent problems?

Back

'Of' represents the whole amount in a percent problem.

Front

What does 'is' represent in percent problems?

Back

'Is' represents the part in a percent problem.

Front

If 62% of a class are girls, what does that mean?

Back

It means that 62 out of every 100 students in the class are girls.

Front

What is 90% of 250?

Back

225

Front

What is 30% of 80?

Back

24

Front

If a shirt costs $50 and is on sale for 20% off, how much do you save?

Back

You save $10, because 20% of $50 is $10.