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Year 7 Best Buys and Unit Prices Worksheet — Level 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 — Answers

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

1.Which is better value: rice at $2.10 for 500 g, or at $4.80 for 2 kg?

Answer: $4.80 for 2 kg ($0.24 per 100 g)

  1. First: $2.10 ÷ 5 = $0.42 per 100 g
  2. Second: $4.80 ÷ 20 = $0.24 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $19.92 for a pack of 24, or at $9.36 for a pack of 12?

Answer: $9.36 for a pack of 12 ($0.78 per pencil)

  1. First: $19.92 ÷ 24 = $0.83 per pencil
  2. Second: $9.36 ÷ 12 = $0.78 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: oats at $16.60 for 2 kg, or at $3.40 for 500 g?

Answer: $3.40 for 500 g ($0.68 per 100 g)

  1. First: $16.60 ÷ 20 = $0.83 per 100 g
  2. Second: $3.40 ÷ 5 = $0.68 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $3.48 for a pack of 12, or at $9.12 for a pack of 24?

Answer: $3.48 for a pack of 12 ($0.29 per pencil)

  1. First: $3.48 ÷ 12 = $0.29 per pencil
  2. Second: $9.12 ÷ 24 = $0.38 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: oats at $7.70 for 1 kg, or at $18.00 for 2 kg?

Answer: $7.70 for 1 kg ($0.77 per 100 g)

  1. First: $7.70 ÷ 10 = $0.77 per 100 g
  2. Second: $18.00 ÷ 20 = $0.90 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pasta at $0.80 for 250 g, or at $3.90 for 1 kg?

Answer: $0.80 for 250 g ($0.32 per 100 g)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 g
  2. Second: $3.90 ÷ 10 = $0.39 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $6.96 for a pack of 24, or at $2.34 for a pack of 6?

Answer: $6.96 for a pack of 24 ($0.29 per pencil)

  1. First: $6.96 ÷ 24 = $0.29 per pencil
  2. Second: $2.34 ÷ 6 = $0.39 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $8.40 for 1 kg, or at $2.25 for 250 g?

Answer: $8.40 for 1 kg ($0.84 per 100 g)

  1. First: $8.40 ÷ 10 = $0.84 per 100 g
  2. Second: $2.25 ÷ 2.5 = $0.90 per 100 g
  3. The cheaper unit price is better value.
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