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Year 7 Best Buys and Unit Prices Worksheet — Level 3 — 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 3 — 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 $3.42 for a pack of 6, or at $11.52 for a pack of 24?

Answer: $11.52 for a pack of 24 ($0.48 per pencil)

  1. First: $3.42 ÷ 6 = $0.57 per pencil
  2. Second: $11.52 ÷ 24 = $0.48 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: oats at $2.70 for 500 g, or at $13.60 for 2 kg?

Answer: $2.70 for 500 g ($0.54 per 100 g)

  1. First: $2.70 ÷ 5 = $0.54 per 100 g
  2. Second: $13.60 ÷ 20 = $0.68 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $4.92 for a pack of 12, or at $13.20 for a pack of 24?

Answer: $4.92 for a pack of 12 ($0.41 per pencil)

  1. First: $4.92 ÷ 12 = $0.41 per pencil
  2. Second: $13.20 ÷ 24 = $0.55 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: rice at $8.60 for 2 kg, or at $2.90 for 500 g?

Answer: $8.60 for 2 kg ($0.43 per 100 g)

  1. First: $8.60 ÷ 20 = $0.43 per 100 g
  2. Second: $2.90 ÷ 5 = $0.58 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $2.10 for 500 g, or at $2.80 for 1 kg?

Answer: $2.80 for 1 kg ($0.28 per 100 g)

  1. First: $2.10 ÷ 5 = $0.42 per 100 g
  2. Second: $2.80 ÷ 10 = $0.28 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $5.40 for a pack of 12, or at $3.78 for a pack of 6?

Answer: $5.40 for a pack of 12 ($0.45 per pencil)

  1. First: $5.40 ÷ 12 = $0.45 per pencil
  2. Second: $3.78 ÷ 6 = $0.63 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $8.88 for a pack of 24, or at $3.36 for a pack of 12?

Answer: $3.36 for a pack of 12 ($0.28 per pencil)

  1. First: $8.88 ÷ 24 = $0.37 per pencil
  2. Second: $3.36 ÷ 12 = $0.28 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: juice at $5.60 for 2 L, or at $0.90 for 250 mL?

Answer: $5.60 for 2 L ($0.28 per 100 mL)

  1. First: $5.60 ÷ 20 = $0.28 per 100 mL
  2. Second: $0.90 ÷ 2.5 = $0.36 per 100 mL
  3. The cheaper unit price is better value.
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