Simple interest
You open a savings account with $1000. You earn 3.5% simple interest each year. How much interest did you earn after 1 year?
$35
5% tax
If a cat weighs 5 pounds at one visit and then 8 pounds at the next. What is the percent change?
60% increase
The school estimated that 130 students would sign up for a creative writing class. 110 students actually signed up. What is the percent error? Round to the nearest tenth of a percent.
18.2% error
You open a savings account that pays 4% simple interest each year. If you start with $700 principal in your account, how much interest will you earn after 3 years?
$84
You go out to eat and your bill comes to approximately $45. You want to leave a 20% tip. How much of a tip would you leave?
$9
Your power-up points in your video game went from 120 to 80. What was the percent of change?
33.333...% decrease
A prize was given to whoever could guess closest to the number of jelly beans in the jar. The winner guessed that there were 520 jelly beans. There were actually 550 jelly beans. What was the winner's percent error? (Round to the nearest tenth of a percent)
5.5% error
You bought a new $850 cell phone on a 12-month payment plan that charged 6.5% simple interest. What is the total amount that you will pay for your phone?
850 + 55.25 = $905.25
You are selling your artwork. It costs you $20 in supplies to create the artwork. You want to markup the price 80% to account for the hard work that went into creating the piece. How much would you charge for your artwork?
20 + 16 = $36
There are 12 members in a bicycle club this fall. By next summer, Noelle hopes the number of members will be 175% of this number. What is Noelle’s goal for the number of members next summer?
21 members
There were 4 Blue cluster students absent on the day of the math test. Ms. Rensko estimated that 6 Blue cluster students would be absent on the day of the test. What was her percent error?
50% error
At the beginning of the year, James has $450 in his savings account. He doesn't deposit or withdraw any money during the year. At the end of the year, he has $468 in the account.
What was the interest rate?
4%
Ms. Salesperson earns a 6.5% commission on her total sales. Last month, she had sales of $55,780. She also earns a salary of $1,400 each month. How much did Ms. Salesperson earn last month in salary and commission?
3625.70 + 1400 = $5025.70
The wholesale cost of a dining room table is $1,115.80. The markup for the table is 20%. What is the selling price of the dining room table?
$1338.96
There are 159 counties in the state of Georgia. Lamont says that there are about 165 counties in the state.
a) What is the amount of the error?
b) What is the percent error? Round to the nearest tenth of a percent.
b) 3.8%
Blake opened a savings account with $250. The account earns a simple interest of 3.5%. What is the total amount of money in the account after 5 years?
250 + 43.75 = $293.75
You go to buy a book at the store. The book is marked down to a price of $13.65. There is a sign saying the book was already marked 30% off. What was the original price of the book?
$19.50
Lena bought 40 tickets at the carnival. After using some of the tickets to ride the bumper cars and play some games, she has 24 tickets left. What is the percent decrease in the number of tickets that she has?
40% decrease
Before taking her dog Lucy to the vet, Ms. Rensko estimated that Lucy would weigh 72 pounds. When she was weighed at the vet, Lucy actually weighed 68 pounds.
a) What was Ms. Rensko's error?
b) What was Ms. Rensko's percent error? Round to the nearest tenth of a percent.
a) 72-68 = 4
b) 5.9%