Percent Proportion

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 20% of 50, calculate 50 x 0.20 = 10.

Front

What is the formula for percent proportion?

Back

The formula for percent proportion is: (part/whole) = (percent/100).

Front

If 72% of a number is 18, what is the number?

Back

To find the number, use the formula: number = part / (percent/100). Here, number = 18 / (72/100) = 25.

Front

What is 30% of $20?

Back

30% of $20 is calculated as: $20 x 0.30 = $6.

Front

If you have 25 questions and answered 18 correctly, what percent did you get right?

Back

To find the percent correct, use the formula: (correct answers / total questions) x 100. Here, (18/25) x 100 = 72%.

Front

What is 10% of $90?

Back

10% of $90 is calculated as: $90 x 0.10 = $9.

Front

If 20 is 80% of what number, how do you find that number?

Back

Use the formula: number = part / (percent/100). Here, number = 20 / (80/100) = 25.

Front

What does it mean if something is 100%?

Back

If something is 100%, it means it is the whole or total amount.

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, 25% = 25/100 = 0.25.