Ten multiple-choice questions on percent problems with money: sales tax, tips, markups, discounts, commission and simple interest. Each question has exactly one correct answer. Change each percent to a decimal first. The explanation after each question shows the typical mistake.
What is the sales tax on this sweatshirt?
Which multiplier gives the sale price after a 30% discount?
Sofia's lunch costs $40.00 before tip. She leaves a 15% tip. What is the total she pays?
What is the sale price of this jacket?
A store pays $60 for a backpack and marks it up 30%. What is the selling price?
Priya earns a 6% commission. How much does she earn on $2,500 of sales?
How much simple interest does $500 earn at 4% per year in 3 years?
An item costs $100. It is discounted 20%, and then the sale price is discounted another 10%. What is the final price?
A scarf is 40% off and now costs $42. What was the original price?
What is the total on this receipt after 5% sales tax is added to the subtotal?
🎉 Quiz complete!
Remember:
- Tax, tips and markups increase an amount: multiply by \(1+r\). Discounts decrease it: multiply by \(1-r\).
- The percent is taken of the original amount, which is 100%.
- Two successive discounts multiply, so 20% off and then 10% off equals 28% off, not 30%.
- Commission equals the rate times sales, and simple interest is \(I=Prt\) with \(r\) written as a decimal.
- Follow the order of the story and round money to the nearest cent at the end.
See every chapter on the Grade 7 math page.