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Percent Error
Percent Increase or Decrease
Sales Tax
Discount Prices
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100

A student thought it would take 2 hours to do a lab report. It took her 3 hours. What is the percent error? 

33.3%

100

The car goes 380 miles with a full tank of gas. The truck goes 30% less than that. How many miles does the truck go? 

266

100

In the state of Maine, sales tax is 5.5%. What is that as a decimal? 

0.055

100

A store is offering 15% off. You buy clothes for $56. How much are they after the sale? 

$47.60

100

John is buying his Twins scooters for $45 each. If he has a 20% off coupon, how much did he pay for the two scooters?

$72

200

A car was showing that it was going 75 miles per hour. The actual speed of the car was 71 miles per hour. What is the percent error?

5.63%

200

A lake was 35ft deep. The water level increased by 5%. What is the new water level? 

36.75ft

200

An item is $9.98. You pay $.20 in sales tax. What is the tax rate (as a decimal)? 

0.02

200

A couch you like is $698. This weekend, they have a 30% off sale. What is the new price of the couch? 

$488.60

200

Felix makes 25% commission at Version. If he sells one customer 1 IPhone 13 for $700, 2 phone cases for $50 each, and 1 phone charger for $30, how much money will he make on the sale?

$207.50

300

It took 32 minutes to drive to Bangor. The GPS expected it to take 36 minutes. What was the percent error? 

12.5%

300

You put $300 into a savings account. The savings account earns 3.5% interest every year. How much money is in your account after one year? 

$310.50

300

At the grocery store, strawberries are $3.97. You pay $0.38 in sales tax. What percent is the sales tax? 

9.57%

300
You bought a new coat when it was $45 with a 25% discount. What was the price of the coat before the discount? 


Hint: 0.75x=$45

$60

300
Target sweaters that are normally $25 are on sale for 30% off. Sam buys 3 and has to pay 7% tax. Find the final price of the sweaters? 


(Round final answer to nearest tenth) 

$56.16

400

The cost of a shirt was $14. Online, it said it was more than that. If the percent error was 12%, what was the online price of the shirt? 

$15.68

400
A car costs $28,700. The car's price decreases by 12% every year. How much is the car worth after 1 year? 

$25,256

400

A meal at a restuarant is $72 before tax and $78.85 after tax. What is the sales tax percentage? (you can round to one OR two decimals) 

9.51%

400

A TV is $450 after a 30% discount. How much was the TV before the discount? 

$642.26

400

Lina bought a TV on sale for $760. If it was a 5% sale. What was the original price of the TV?

$800

500

A GPS estimated that the travel time to New Hampshire. The actual time was 174 minutes. If the percent error was 24%, how long did the GPS say it would take? 

215.76 minutes

500

Laptop A is $850. Laptop B is $870. Laptop B is 3% off. Which laptop is cheaper? 

Laptop B

500

In City A, the price of pasta is $2 before sales tax, and $2.29 after sales tax. In City B, the price of pasta is $2 before sales tax, and $2.35 after sales tax. What is the sales tax in both cities?

City A = 0.145 or 14.5%

City B = 0.175 or 17.5%

500

At Store A, a shirt is $18. At store B, the same shirt is $22. If store A is have a 10% off sale, and store B is having a 20% off sale, which store has the cheaper price? 

Store A


Store A = $16.20

Store B = $17.60

500

Frida sells her lemonade for $1.50. If this is a 25% mark up, what did she pay for her materials?

$1.20