Percent Problems

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios.

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 35% of 20, calculate 20 * 0.35 = 7.

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 4 is of 50, calculate (4/50) * 100 = 8%.

Front

If 36 is 200% of a number, how do you find that number?

Back

To find the number, divide the part by the percent (in decimal form). For example, 36 / 2 = 18.

Front

What does it mean if a number is 100% of another number?

Back

It means that the two numbers are equal. For example, 50 is 100% of 50.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100. For example, 1/4 = 0.25 = 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 total when given a part and its percentage?

Back

To find the total, divide the part by the percentage (in decimal form). For example, if 13 is 26% of a number, the total is 13 / 0.26 = 50.

Front

What is the percent increase formula?

Back

The percent increase formula is: ((New Value - Old Value) / Old Value) * 100.

Front

What is the percent decrease formula?

Back

The percent decrease formula is: ((Old Value - New Value) / Old Value) * 100.