Percent Problems

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 * 0.20 = 10.

Front

What does it mean to find 'X% of Y'?

Back

Finding 'X% of Y' means calculating how much X percent of the total amount Y is.

Front

If 25% of a number is 50, what is the number?

Back

The number is 200. (50 ÷ 0.25 = 200)

Front

What is the formula to find what number a percentage is of?

Back

The formula is: Number = Part ÷ Percentage. For example, if 30 is 20% of a number, the number is 30 ÷ 0.20 = 150.

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 percentages and fractions?

Back

Percentages can be converted to fractions by placing the percentage over 100 and simplifying. For example, 50% = 50/100 = 1/2.

Front

If 60 is 15% of what number, how do you find the number?

Back

The number is 400. (60 ÷ 0.15 = 400)

Front

What is 12% of 325?

Back

12% of 325 is 39. (325 * 0.12 = 39)

Front

If 120 is 30% of a number, what is the number?

Back

The number is 400. (120 ÷ 0.30 = 400)