Percent Equation

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents how much of something there is out of a total of 100.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal) and then divide by 100.

Front

What is the formula for finding the whole when given a part and a percent?

Back

Whole = Part / (Percent / 100)

Front

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

Back

Number = 50 / (25 / 100) = 200

Front

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

Back

It means that the number is equal to the other number.

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 then multiply by 100.

Front

What is 10% of 150?

Back

10% of 150 = 150 * 0.10 = 15

Front

If 60% of a class of 30 students are girls, how many girls are in the class?

Back

Number of girls = 30 * 0.60 = 18 girls.

Front

What is the percent increase if a price goes from $50 to $65?

Back

Percent Increase = ((65 - 50) / 50) * 100 = 30%.

Front

How do you find the percent decrease?

Back

Percent Decrease = ((Old Value - New Value) / Old Value) * 100.