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

Front

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

Back

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

Front

If 25% of a number is 30, what is the number?

Back

The number is 120. (30 / 0.25 = 120)

Front

What is 10% of 200?

Back

10% of 200 is 20. (200 x 0.10 = 20)

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = 0.25 x 100 = 25%.

Front

What is 50% of 80?

Back

50% of 80 is 40. (80 x 0.50 = 40)

Front

If a shirt costs $40 and is on sale for 25% off, what is the sale price?

Back

The sale price is $30. (25% of $40 is $10, so $40 - $10 = $30)

Front

What percent is 15 out of 60?

Back

25%. (15/60 x 100 = 25%)

Front

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

Back

To find the total, divide the part by the percentage (in decimal form). For example, if 30 is 60%, the total is 30 / 0.60 = 50.