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Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — Answers

Answer sheet with worked solutions for the Year 7 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Ratio & Rates

Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — Answers

Find the price for the same amount of each (the unit price), then compare. Show your working.

1.Which is better value: pencils at $5.22 for a pack of 6, or at $12.72 for a pack of 12?

Answer: $5.22 for a pack of 6 ($0.87 per pencil)

  1. First: $5.22 ÷ 6 = $0.87 per pencil
  2. Second: $12.72 ÷ 12 = $1.06 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $7.92 for a pack of 12, or at $4.26 for a pack of 6?

Answer: $7.92 for a pack of 12 ($0.66 per pencil)

  1. First: $7.92 ÷ 12 = $0.66 per pencil
  2. Second: $4.26 ÷ 6 = $0.71 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: oats at $2.90 for 1 kg, or at $0.85 for 500 g?

Answer: $0.85 for 500 g ($0.17 per 100 g)

  1. First: $2.90 ÷ 10 = $0.29 per 100 g
  2. Second: $0.85 ÷ 5 = $0.17 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: rice at $6.40 for 1 kg, or at $3.80 for 500 g?

Answer: $6.40 for 1 kg ($0.64 per 100 g)

  1. First: $6.40 ÷ 10 = $0.64 per 100 g
  2. Second: $3.80 ÷ 5 = $0.76 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: juice at $3.90 for 1 L, or at $1.10 for 250 mL?

Answer: $3.90 for 1 L ($0.39 per 100 mL)

  1. First: $3.90 ÷ 10 = $0.39 per 100 mL
  2. Second: $1.10 ÷ 2.5 = $0.44 per 100 mL
  3. The cheaper unit price is better value.
6.Which is better value: pasta at $0.90 for 500 g, or at $2.80 for 1 kg?

Answer: $0.90 for 500 g ($0.18 per 100 g)

  1. First: $0.90 ÷ 5 = $0.18 per 100 g
  2. Second: $2.80 ÷ 10 = $0.28 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pasta at $1.20 for 250 g, or at $3.80 for 1 kg?

Answer: $3.80 for 1 kg ($0.38 per 100 g)

  1. First: $1.20 ÷ 2.5 = $0.48 per 100 g
  2. Second: $3.80 ÷ 10 = $0.38 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: juice at $7.50 for 1 L, or at $13.60 for 2 L?

Answer: $13.60 for 2 L ($0.68 per 100 mL)

  1. First: $7.50 ÷ 10 = $0.75 per 100 mL
  2. Second: $13.60 ÷ 20 = $0.68 per 100 mL
  3. The cheaper unit price is better value.
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