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 the percent of a number?

Back

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

Front

What is the formula to find the whole when given a part and a percent?

Back

Whole = Part / (Percent / 100)

Front

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

Back

Divide 20 by 0.8 (which is 80% in decimal form) to find the whole number.

Front

What is the relationship between fractions and percents?

Back

Percents are a specific type of fraction where the denominator is always 100.

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 the percent increase formula?

Back

Percent Increase = ((New Value - Original Value) / Original Value) x 100.

Front

What is the percent decrease formula?

Back

Percent Decrease = ((Original Value - New Value) / Original Value) x 100.

Front

If a meal costs $28 and you want to leave a 20% tip, how do you calculate the tip?

Back

Multiply $28 by 0.20 to find the tip amount.

Front

What percent of 50 is 20?

Back

40%.