Percent Error
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%
John hikes for x miles. Sam hikes for 1/2 less.
y = 1/2x
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
In the state of Maine, sales tax is 5.5%. What is that as a decimal?
0.055
A store is offering 15% off. You buy clothes for $56. How much are they after the sale?
$47.60
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%
Joe walks for x hours. Tim walks 1/4 more than that. Write this equation using a decimal.
y = 1.25x
A lake was 35ft deep. The water level increased by 5%. What is the new water level?
36.75ft
An item is $9.98. You pay $.20 in sales tax. What is the tax rate (as a decimal)?
0.02
A couch you like is $698. This weekend, they have a 30% off sale. What is the new price of the couch?
$488.60
It took 32 minutes to drive to Bangor. The GPS expected it to take 36 minutes. What was the percent error?
12.5%
Noah picks x amount of strawberries. Jill picks 5/8 less than that. Write an equation using decimals.
y= 0.375x
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
At the grocery store, strawberries are $3.97. You pay $0.38 in sales tax. What percent is the sales tax?
9.57%
Hint: 0.75x=$45
$60
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
If a certain tax rate is 6%, write an expression to show how much the total cost of an item, t, would be.
t + t0.06
$25,256
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%
A TV is $450 after a 30% discount. How much was the TV before the discount?
$642.26
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
If the tax rate in Canada is 9.25%, write an expression to show how much the total price of a shirt, S, would be.
s + s0.0925
Laptop A is $850. Laptop B is $870. Laptop B is 3% off. Which laptop is cheaper?
Laptop B
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%
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