Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 40% of 230, calculate 230 * 0.40.

Front

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

Back

The formula is: (part/whole) * 100 = percent. For example, to find what percent 8 is of 20, calculate (8/20) * 100.

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 relationship between percentages, fractions, and decimals?

Back

Percentages, fractions, and decimals are different ways to represent the same value. For example, 50% = 0.5 = 1/2.

Front

How do you find the whole when given a part and a percentage?

Back

To find the whole, divide the part by the percentage (in decimal form). For example, if 40% of a number is 8, the whole is 8 / 0.40 = 20.

Front

What is 100% of a number?

Back

100% of a number is the number itself. For example, 100% of 250 is 250.

Front

How do you find the percentage increase or decrease?

Back

To find the percentage increase or decrease, use the formula: ((new value - old value) / old value) * 100.

Front

What is the percent proportion method?

Back

The percent proportion method involves setting up a proportion to solve for an unknown percentage. It uses the relationship: part/whole = percent/100.

Front

How do you express a percentage as a decimal?

Back

To express a percentage as a decimal, divide by 100. For example, 25% = 25/100 = 0.25.