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Grade 8 Math: Ratios and proportionsQuizPrint.CA Ontario curriculum: Mathematics (2020) · Number B2.8 — compare proportional situations and determine unknown values 1. Write the ratio of 16 red counters to 2 blue counters. 2. If 15:9 = 135:x, what is x? 3. A ratio table shows 2 → 21, 4 → 42, 6 → 63. What goes with 8? 4. 11 pencils cost $41.80. How much does one pencil cost? 5. A train travels 82 km each hour. At the same rate, how far does it travel in 11 hours? 6. A map scale is 1 cm to 3 km. How far apart are two towns that are 7 cm apart on the map? 7. A drawing is enlarged by a scale factor of 8. A side that measures 6 cm becomes how long? 8. A club has 49 students. The ratio of boys to girls is 4:3. Then 6 girls join and 3 boys leave. What is the new ratio of girls to boys? 9. A shop uses 8 cups of mix to make 15 muffins. If the shop plans to sell 45 muffins and expects to lose 0.5 cups to waste for each batch of 15, how much mix should they buy in total? 10. The graph shows a proportional relationship between crates (x) and minutes (y). What is the unit rate in minutes per crate? Sign in to manage students and save worksheet results. Answer keyGrade 8 Math: Ratios and proportions Ontario curriculum: Mathematics (2020) · Number B2.8 — compare proportional situations and determine unknown values Question numbers match the worksheet.
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