Grade 7 · Math · Unit 6 of 16
Tax, Tips & Discounts
Percents with real money
What your child practises
Everyday money percents: sale prices, sales tax (with the rates given), restaurant tips, comparing deals and simple interest on savings.
Alberta Curriculum learning outcome: N3 · solving percent problems, including sales tax, tips and discounts
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
A pair of headphones costs $112.00. It's 10% off, and then 5% GST is added to the sale price. What is the final price?
- $106.40
- $105.84
- $106.84
- $100.80
Show answer
$105.84
Hint: Sale price: $112.00 − 10% = $100.80. Tax: 5% of $100.80 = $5.04. Final price: $105.84.
Question 2
A hoodie regularly costs $99.00. It's on sale for $94.05. What percent is the discount?
answer box%
Show answer
5 %
Hint: The discount is $99.00 − $94.05 = $4.95. Divide by the regular price: 4.95 ÷ 99.00 = 0.05 = 5%.
Question 3
Noah puts $1700.00 in a savings account that pays 2% simple interest per year. How much interest will it earn in 3 years?
answer box
Show answer
102.00
Hint: Simple interest: I = P × r × t = $1700.00 × 0.02 × 3 = $102.00.
Question 4
A pair of headphones costs $96.00. Sales tax is 15% HST. What is the total cost, in dollars?
answer box
Show answer
110.40
Hint: Tax: 15% of $96.00 = 0.15 × 96.00 = $14.40. Total: $96.00 + $14.40 = $110.40. (Or multiply by 1.15.)
Question 5
A tent regularly costs $35.00. It's on sale for 30% off. What is the sale price, in dollars?
🏷️30% offanswer box
Show answer
24.50
Hint: Discount: 30% of $35.00 = $10.50. Sale price: $35.00 − $10.50 = $24.50. (Or pay 70%: 0.7 × $35.00.)
Question 6
Two stores sell the same scooter. Which store has the lower sale price?
Store Regular price Sale A $70.00 30% off B $100.00 20% off - Store B
- They cost the same
- Store A
Show answer
Store A
Hint: Store A: pay 70% of $70.00 = $49.00. Store B: pay 80% of $100.00 = $80.00. Store A is cheaper.