Percent and Proportion Review

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 is a proportion?

Back

Front

How do you determine if two ratios form a proportion?

Back

Front

What is the formula to calculate tax on a purchase?

Back

The formula to calculate tax is: Tax = Purchase Price * Tax Rate.

Front

How do you calculate a tip based on a bill?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for a $50 bill with a 15% tip, calculate 50 * 0.15 = $7.50.

Front

What is the relationship between percent and proportion?

Back

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100. For example, 75% = 0.75.

Front

How do you find the total amount if you know the part and the percent?

Back

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

Front

What is the formula for finding the percent of a number?

Back

The formula is: Percent = (Part / Whole) * 100.