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Year 8 Best Buys and Unit Prices Worksheet — Level 2 — Answers

Answer sheet with worked solutions for the Year 8 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Ratio & Rates

Year 8 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: pencils at $18.24 for a pack of 24, or at $10.68 for a pack of 12?

Answer: $18.24 for a pack of 24 ($0.76 per pencil)

  1. First: $18.24 ÷ 24 = $0.76 per pencil
  2. Second: $10.68 ÷ 12 = $0.89 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: pasta at $3.20 for 500 g, or at $4.70 for 1 kg?

Answer: $4.70 for 1 kg ($0.47 per 100 g)

  1. First: $3.20 ÷ 5 = $0.64 per 100 g
  2. Second: $4.70 ÷ 10 = $0.47 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: juice at $2.90 for 1 L, or at $0.40 for 250 mL?

Answer: $0.40 for 250 mL ($0.16 per 100 mL)

  1. First: $2.90 ÷ 10 = $0.29 per 100 mL
  2. Second: $0.40 ÷ 2.5 = $0.16 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: pasta at $1.60 for 1 kg, or at $1.40 for 500 g?

Answer: $1.60 for 1 kg ($0.16 per 100 g)

  1. First: $1.60 ÷ 10 = $0.16 per 100 g
  2. Second: $1.40 ÷ 5 = $0.28 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: oats at $6.70 for 1 kg, or at $2.65 for 500 g?

Answer: $2.65 for 500 g ($0.53 per 100 g)

  1. First: $6.70 ÷ 10 = $0.67 per 100 g
  2. Second: $2.65 ÷ 5 = $0.53 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $2.95 for 500 g, or at $8.00 for 2 kg?

Answer: $8.00 for 2 kg ($0.40 per 100 g)

  1. First: $2.95 ÷ 5 = $0.59 per 100 g
  2. Second: $8.00 ÷ 20 = $0.40 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $9.60 for a pack of 24, or at $6.12 for a pack of 12?

Answer: $9.60 for a pack of 24 ($0.40 per pencil)

  1. First: $9.60 ÷ 24 = $0.40 per pencil
  2. Second: $6.12 ÷ 12 = $0.51 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $1.68 for a pack of 6, or at $11.28 for a pack of 24?

Answer: $1.68 for a pack of 6 ($0.28 per pencil)

  1. First: $1.68 ÷ 6 = $0.28 per pencil
  2. Second: $11.28 ÷ 24 = $0.47 per pencil
  3. The cheaper unit price is better value.
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