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 used to find out what percent one number is of another.

Front

How do you calculate 30% of a number?

Back

To calculate 30% of a number, multiply the number by 0.30 (or 30/100). For example, 30% of 80 is 80 x 0.30 = 24.

Front

What is the formula to find what percent one number is of another?

Back

The formula is: (Part/Whole) x 100 = Percent. For example, to find what percent 28 is of 80, use (28/80) x 100 = 35%.

Front

If 15 out of 25 boys chose to go swimming, how do you find the percent?

Back

Use the formula: (Part/Whole) x 100. Here, (15/25) x 100 = 60%.

Front

What is the relationship between part, whole, and percent?

Back

The part is the portion of the whole, and the percent is the part expressed as a fraction of the whole multiplied by 100.

Front

How do you find the whole if you know the part and the percent?

Back

Use the formula: Whole = Part / (Percent/100). For example, if 270 is 30%, then Whole = 270 / (30/100) = 900.

Front

What is 40% of 200?

Back

To find 40% of 200, multiply 200 by 0.40: 200 x 0.40 = 80.

Front

If 40% of students are boys, how do you find the number of girls?

Back

First, find the number of boys: 40% of 200 = 80 boys. Then subtract from the total: 200 - 80 = 120 girls.

Front

What does it mean if a number is 30% of another number?

Back

It means that the first number is 30 parts out of 100 parts of the second number.

Front

How can you express 35% as a fraction?

Back

35% can be expressed as 35/100, which simplifies to 7/20.