Percent Proportion

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'.

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 whole when given a part and a percentage?

Back

The formula is: Whole = Part / (Percentage in decimal form). For example, if 20 is 80% of a number, the whole is 20 / 0.80 = 25.

Front

If 40% of a number is 80, what is the number?

Back

The number is 200. (80 / 0.40 = 200)

Front

What does it mean if a number is 25% of another number?

Back

It means that the first number is one-fourth of the second number.

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 the fraction by 100. For example, 1/4 = 0.25 = 25%.

Front

If 18 is 40% of what number, what is the number?

Back

The number is 45. (18 / 0.40 = 45)

Front

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

Back

To find what percentage one number is of another, divide the first number by the second number and multiply by 100. For example, (20 / 80) * 100 = 25%.

Front

What is the formula for finding a percentage of a total?

Back

The formula is: Percentage = (Part / Total) * 100.