Percents 7th grade

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 total cost including sales tax?

Back

To calculate the total cost including sales tax, multiply the original price by the sales tax rate (as a decimal) and then add that amount to the original price.

Front

What is the formula to find the percent decrease?

Back

Percent Decrease = ((Original Price - Sale Price) / Original Price) x 100.

Front

If an item costs $100 and is on sale for $80, what is the percent decrease?

Back

Percent Decrease = ((100 - 80) / 100) x 100 = 20%.

Front

How do you find 40% of a number?

Back

To find 40% of a number, multiply the number by 0.40.

Front

What is the total cost of a $990 TV with a 9% tax?

Back

Total Cost = $990 + ($990 x 0.09) = $1,079.10.

Front

If a jacket costs $85 and is 40% off, how much do you pay?

Back

Discount = $85 x 0.40 = $34. Sale Price = $85 - $34 = $51.

Front

What is the sales tax on a $50 purchase with a 5% tax rate?

Back

Sales Tax = $50 x 0.05 = $2.50.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100.

Front

What is 25% of 200?

Back

25% of 200 = 200 x 0.25 = 50.