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 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 * 0.40 = 92.

Front

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

Back

The formula is: Whole = Part / (Percent / 100). For example, if 34% of a number is 51, the whole is 51 / (34/100) = 150.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit of another quantity.

Front

If you spend $40 on 5 pounds of concrete, how much do you spend per pound?

Back

You spend $8 per pound. This is calculated by dividing the total cost by the total weight: $40 / 5 pounds = $8 per pound.

Front

What is 30 as a percent of 40?

Back

30 is 75% of 40. This is calculated by (30 / 40) * 100 = 75%.

Front

How do you solve for x in a percent proportion equation?

Back

To solve for x, set up the equation as part/whole = percent/100 and cross-multiply to find x.

Front

What does it mean if a number is 20% of another number?

Back

It means that the first number is 20 out of every 100 parts of the second number.

Front

How do you find what percent one number is of another?

Back

To find what percent one number is of another, divide the first number by the second number and multiply by 100. For example, to find what percent 30 is of 40, calculate (30 / 40) * 100 = 75%.