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