Percents and Mental Math

Best Buy is selling a 62” TV for $1,250. The TV is on sale for 15% off and there is a 6% sales tax. What is the final cost of the TV?

• $198.75

• $1,126.25

• $998.75

• $1,523.75

Fill in the percent equation for this problem:

54 is what percent of 90?

• 90 = x(54)

• x = 54(90)

• 54 = 0.90x

• 54 = x(90)

Fill in the percent equation for this problem:

What is 5% of 60?

• 0.05 = x(60)

• x = 0.05(60)

• 60 = 0.05x

Use mental math.

Find 10% of 90.

• 900

• 90

• 9

• 0.9

What is 100% of 45?

• 4.5

• 450

• 4

• 45

A waitress recieved a 15% tip. If her tip was $8.25 how much was the bill?

• $1.23

• $55

• $16.50

• $1.24

Daniel works at an electronics store. He makes a commission of 15% on everything he sells. If he sells a laptop for $293, how much money does Daniel earn in commission?

• $43.96

• $249.50

• $43.95

• $24.95

Walter bought a CD for $17, a pair of shoes for $30, and a pair of jeans for $25. The tax rate was 6%.

What was the total cost of Walter's purchase?

• $74.32

• $4.32

• $76.32

• $72.00

In 1999, the price of unleaded fuel was $1.09. In 2015, the price of unleaded fuel was $1.89. What is the percent change?

• 173% increase

• 73% increase

• 73% decrease

• 27% increase

Last year 2,950 people attended a summer music festival. This year attendance was 2,376. What was the percent of change in attendance?

Round your answer to the nearest whole percent.

• Increase 24%

• Increase 19%

• Decrease 24%

• Decrease 19%