Percent Proportion Practice

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage. It is often used to find out how much one quantity is in relation to another.

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 * 0.20 = 10.

Front

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

Back

The formula is: Part = (Percent / 100) * Whole.

Front

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

Back

The number is 200. (50 = 25% of x; x = 50 / 0.25 = 200)

Front

What does it mean if a quantity is proportional to another?

Back

It means that as one quantity changes, the other quantity changes at a constant rate.

Front

If a person eats 2000 calories and 30% comes from carbohydrates, how many calories come from carbohydrates?

Back

600 calories. (2000 * 0.30 = 600)

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, 75% becomes 0.75.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

If 60% of a class of 30 students passed an exam, how many students passed?

Back

18 students. (30 * 0.60 = 18)

Front

What is the percent increase formula?

Back

Percent Increase = ((New Value - Old Value) / Old Value) * 100.