Year 7 Ratio Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 7 ratio & rates worksheet.
Year 7 Ratio Worksheet — Level 1 — Practice Set 4 — Answers
Part A: Simplify
1.Simplify the ratio 18 : 27
Answer: 2 : 3
- HCF of 18 and 27 is 9
- Divide both parts by 9
2.Simplify the ratio 14 : 2
Answer: 7 : 1
- HCF of 14 and 2 is 2
- Divide both parts by 2
3.Simplify the ratio 27 : 3
Answer: 9 : 1
- HCF of 27 and 3 is 3
- Divide both parts by 3
4.Simplify the ratio 3 : 24
Answer: 1 : 8
- HCF of 3 and 24 is 3
- Divide both parts by 3
5.Simplify the ratio 21 : 24
Answer: 7 : 8
- HCF of 21 and 24 is 3
- Divide both parts by 3
6.Simplify the ratio 8 : 12
Answer: 2 : 3
- HCF of 8 and 12 is 4
- Divide both parts by 4
Part B: Divide in a ratio
7.Divide $30 in the ratio 1 : 5.
Answer: $5 and $25
- Total parts: 1 + 5 = 6
- One part: 30 ÷ 6 = 5
- 1 × 5 = 5 and 5 × 5 = 25
8.Divide $10 in the ratio 3 : 2.
Answer: $6 and $4
- Total parts: 3 + 2 = 5
- One part: 10 ÷ 5 = 2
- 3 × 2 = 6 and 2 × 2 = 4
9.Divide $90 in the ratio 5 : 4.
Answer: $50 and $40
- Total parts: 5 + 4 = 9
- One part: 90 ÷ 9 = 10
- 5 × 10 = 50 and 4 × 10 = 40
10.Divide $72 in the ratio 4 : 2.
Answer: $48 and $24
- Total parts: 4 + 2 = 6
- One part: 72 ÷ 6 = 12
- 4 × 12 = 48 and 2 × 12 = 24
11.Divide $42 in the ratio 5 : 2.
Answer: $30 and $12
- Total parts: 5 + 2 = 7
- One part: 42 ÷ 7 = 6
- 5 × 6 = 30 and 2 × 6 = 12
12.Divide $40 in the ratio 1 : 3.
Answer: $10 and $30
- Total parts: 1 + 3 = 4
- One part: 40 ÷ 4 = 10
- 1 × 10 = 10 and 3 × 10 = 30
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.
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