Percent Application

Percent Error

100

You thought that 5 of your friends would show up for dinner, but 10 did. What is the percent error?

What is 50%

200

You estimated your height to be 60 inches, but at the doctor's office, they actually measured your height to be 61.5 inches. What is the percent error?

What is 2% error.

300

You thought you would score 12 points in your basketball game, but you ended up scoring only 9 points. What was your percent error?

What is 33%

400

After flipping a coin 20 times, you expected that you would flip heads 10 times. You actually only flipped heads 7 times. What is the percent error?

What is 43%

500

You estimated that a song would be about 4 minutes long, but it was actually 4 minutes and 15 second long. Find the percent error.

What is 6%

Percent Change

100

A computer store changed the price of a laptop. It was originally $900, but now it is $1,100. Find the percent of change.

What is a 22% increase

200

Original amount: 35 New Amount: 39

What is an 11% increase

300

Student council has 19 members, compared to the 22 they had last year.

What is a 14% decrease.

400

Last season, Dean scored 153 points during the basketball season. This year, he scored 147. What is his percent of change?

What is a 4% decrease.

500

The total amount of rainfall last month was 16 inches. This month, it rained a total of 12.5 inches. What is the percent of change?

What is a 22% decrease.

Tax

100

What is the sales tax when a skateboard costs $40 and has a sales tax rate of 4%?

What is $1.60

200

A belt costs $23.00. The sales tax on the belt is $1.38. What percent of sales tax were you charged?

What is 6%

300

You are charged 6% sales tax. You purchase a new bicycle for $27. What is the total price of the bicycle including tax?

What is $28.62

400

You bought new sneakers for $81.12 including tax. The price before tax on the sneakers was $78. What percent of sales tax were you charged?

What is 4%

500

Maggie and Laura go out to lunch at TGIFridays. The bill for their restaurant meal is $22. The sales tax is 6% and they decide to leave a 15% tip. How much does each girl pay?

What is $13.41.

Tip

100

How much would you tip your hairdresser if your haircut costs $25 and you want to tip her 15%?

What is $3.75

200

Julie went to Bertucci's last night for dinner. Her meal costs $24.20 and she leaves a $3.63 tip. What percent tip did she leave for her waiter?

What is 15%

300

Alex went to Cheddar's and spent $18.25. He wants to tip his waiter 25% for being so awesome. What would the total bill be?

What is $22.81.

400

Michael’s bill at a restaurant was $46.32. He wants to leave a 17% tip. What will the total bill be, including tip?

What is $54.19

500

You and five friends go to Cheesecake factory for your birthday. The total bill comes to $243. You want to tip 20% and the tax is 6%. How much does each person owe?

What is $51.52.

Commission

100

A car salesman sells a car worth $17,500 with a 9% commission rate. How much commission did he earn?

What is $1575

200

Lauren sold $460 worth of clothes at Nordstrom and has a commission rate of 3%. How much commission did she earn?

What is $13.80?

300

Bobby earned $26 commission with a 4% commission rate. How much did he sell?

What is $650

400

Marcy and Jill sell insurance policies. They each earn a commission rate of 4% on their sales. One week, Marcy sells $1650 in insurance. The same week, Jill sells $1495 in insurance. How much more commission does Marcy earn for the week?

What is $6.20 more

500

Mr. Li and Ms. Brown both sell used cars. Mr. Li sells a car for $9950 and earns $447.75 commission. Ms. Brown sells a car for $10,300 and earns $453.20 commission. Who earns a greater commission rate?

What is Mr. Li at 4.5 %. Ms. Brown has 4.4%