Percent Proportions

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage. It shows the relationship between a part and the total, often used to solve problems involving percentages.

Front

How do you find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 40% of 230, calculate 230 x 0.40 = 92.

Front

What is the formula to find the whole when given a percentage and a part?

Back

The formula is: Whole = Part / (Percentage in decimal form). For example, if 34% of a number is 51, the whole is 51 / 0.34 = 150.

Front

What does the term 'ratio' mean?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other. It can be expressed in different forms, such as a fraction or with a colon.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD). For example, the ratio 15:20 can be simplified by dividing both by 5, resulting in 3:4.

Front

What is the boy:girl ratio in a class with 15 boys and 20 girls?

Back

The boy:girl ratio is 3:4.

Front

If a person consumes 2400 calories and 36% comes from fat, how many calories are from fat?

Back

864 calories come from fat.

Front

What is 40% of 230?

Back

40% of 230 is 92.

Front

If 34% of a number is 51, what is the number?

Back

The number is 150.

Front

How do you express a ratio of red toy cars to all toy cars if there are 3 red, 2 black, and 5 white toy cars?

Back

The ratio of red toy cars to all toy cars is 3:10.