Percent 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 x 0.20 = 10.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 80 is 40.

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. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is the formula for calculating sales tax?

Back

Sales Tax = Cost of Item x Sales Tax Rate. For example, if an item costs $100 and the sales tax rate is 8%, the sales tax is $100 x 0.08 = $8.

Front

How do you find the total cost including tax?

Back

Total Cost = Cost of Item + Sales Tax. For example, if an item costs $100 and the sales tax is $8, the total cost is $100 + $8 = $108.

Front

What is a tip?

Back

A tip is a small amount of money given to someone for their service, usually calculated as a percentage of the total bill.

Front

How do you calculate a tip?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for a $50 bill with a 20% tip, calculate 50 x 0.20 = $10.

Front

What is 25% of 200?

Back

25% of 200 is 50. (200 x 0.25 = 50)

Front

What is the percent increase formula?

Back

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