Grade 8 · Math · Unit 2 of 13
Percents & GST
Percents less than 1% and more than 100%, plus GST
What your child practises
Percents of all sizes, including 0.5% and 150%, moving between fractions, decimals and percents, adding the 5% GST (Alberta has no provincial sales tax), and why two percent changes in a row do not simply add.
Alberta Curriculum learning outcome: N3 · percents from fractions of 1% to more than 100%, converting between fractions, decimals and percents, GST, and combined percents
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
What is 0.5% of 600?
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3
Hint: 0.5% is less than 1%. As a decimal it is 0.005, and 0.005 × 600 = 3.
Question 2
A town of 400 people grows by 10% one year. The next year it grows by 10% of the new total. How many people live there now?
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484
Hint: After year one: 400 × 1.1 = 440. After year two: that × 1.1 = 484. It is not a 20% increase, because the second percent is taken from a bigger number.
Question 3
What is 40% of 120?
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48
Hint: 40% = 40/100. 40/100 × 120 = 48.
Question 4
Which percent is equal to 9/4?
- 94%
- 22.5%
- 2.25%
- 225%
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225%
Hint: Divide the top by the bottom to get a decimal, then multiply by 100.
Question 5
Which decimal is equal to 250%?
- 25
- 250
- 2.5
- 0.25
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2.5
Hint: Divide the percent by 100: move the decimal point two places to the left.
Question 6
In Alberta there is 5% GST and no provincial sales tax. A jacket costs $90 before tax. What is the total price, in dollars?
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94.5
Hint: 5% of 90 is 4.5. Add it to 90, or multiply by 1.05: 94.5.