GL Unit 4 Learning Check #3: Percent Proportions

Front

What is a percent proportion?

Back

A percent proportion is a way to express a relationship between a part and a whole in terms of percentage. It is often written as part/whole = percent/100.

Front

How do you find 40% of a number?

Back

To find 40% of a number, multiply the number by 0.40 (or 40/100). For example, 40% of 200 is 200 x 0.40 = 80.

Front

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

Back

80 boys attended the play (200 x 0.40 = 80).

Front

How do you calculate the number of girls if 40% of 200 students are boys?

Back

Subtract the number of boys from the total: 200 - 80 = 120 girls.

Front

What is 30% of 80?

Back

24 (30% of 80 is calculated as 80 x 0.30 = 24).

Front

How do you find the percent of a part compared to a whole?

Back

Divide the part by the whole and multiply by 100. For example, to find what percent 15 is of 25, calculate (15/25) x 100 = 60%.

Front

What percent of 80 is 28?

Back

35% (28 is 35% of 80, calculated as (28/80) x 100).

Front

If 270 is 30% of a number, how do you find that number?

Back

Set up the equation: 270 = 0.30 x number. Solve for the number: number = 270 / 0.30 = 900.

Front

What is the formula to convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100.

Front

How do you express 15 out of 25 as a percent?

Back

(15/25) x 100 = 60%.