Extra Practice 8
Lesson 3.8: Solving Percent Problems
1. Calculate.
a) 10% of 78
d) 65% of 84
b) 15% of 60
c) 20% of 120
e) 87% of 118
f) 37% of 215
2. Ms. Leitch has 27 students in her class.
About 30% of the students in Ms. Leitch’s class enjoy playing soccer.
a) About how many students enjoy playing soccer?
b) The school has a total of 539 students.
Assume 30% of all students in the school enjoy playing soccer.
About what percent of the school’s population enjoys playing soccer?
3. The regular price of a skateboard is $74.99.
Find the sale price before taxes when the skateboard is on sale for:
a) 30% off
b) 25% off
c) 60% off
d) 50% off
4. Find the tip left by each customer at a restaurant.
a) Wally: 15% of $25.73
b) Priya: 25% of $19.48
c) Alyssa: 10% of $48.22
5. The Goods and Services tax (GST) is currently 6%.
For each item below:
i) Find the GST.
ii) Find the cost of the item including GST.
a) package of 5 mechanical pencils: $4.49
b) backpack: $29.99
c) box of golf balls: $32.49
Extra Practice Sample Answers
Extra Practice 8 –
Lesson 3.8
1. a) 70.20
b) 9
c) 24
d) 54.6
2. a) About 8 students (8.1)
b) About 162 students (161.7)
3. a) $52.49
b) $56.24
c) $30.00
d) $37.49
4. a) $1.29
b) $0.97
c) $2.41
5. a) i) $0.22
ii) $4.71
b) i) $1.50 ii) $31.49
c) i) $8.12 ii) $170.57
e) 15.34
f) 135.45