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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: pasta at $1.50 for 1 kg, or at $1.25 for 500 g?

Answer: $1.50 for 1 kg ($0.15 per 100 g)

  1. First: $1.50 ÷ 10 = $0.15 per 100 g
  2. Second: $1.25 ÷ 5 = $0.25 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: juice at $0.80 for 250 mL, or at $3.40 for 2 L?

Answer: $3.40 for 2 L ($0.17 per 100 mL)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 mL
  2. Second: $3.40 ÷ 20 = $0.17 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: juice at $4.80 for 1 L, or at $11.00 for 2 L?

Answer: $4.80 for 1 L ($0.48 per 100 mL)

  1. First: $4.80 ÷ 10 = $0.48 per 100 mL
  2. Second: $11.00 ÷ 20 = $0.55 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: juice at $7.10 for 1 L, or at $18.20 for 2 L?

Answer: $7.10 for 1 L ($0.71 per 100 mL)

  1. First: $7.10 ÷ 10 = $0.71 per 100 mL
  2. Second: $18.20 ÷ 20 = $0.91 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: juice at $13.00 for 2 L, or at $5.40 for 1 L?

Answer: $5.40 for 1 L ($0.54 per 100 mL)

  1. First: $13.00 ÷ 20 = $0.65 per 100 mL
  2. Second: $5.40 ÷ 10 = $0.54 per 100 mL
  3. The cheaper unit price is better value.
6.Which is better value: juice at $7.40 for 1 L, or at $18.40 for 2 L?

Answer: $7.40 for 1 L ($0.74 per 100 mL)

  1. First: $7.40 ÷ 10 = $0.74 per 100 mL
  2. Second: $18.40 ÷ 20 = $0.92 per 100 mL
  3. The cheaper unit price is better value.
7.Which is better value: pasta at $2.20 for 250 g, or at $4.15 for 500 g?

Answer: $4.15 for 500 g ($0.83 per 100 g)

  1. First: $2.20 ÷ 2.5 = $0.88 per 100 g
  2. Second: $4.15 ÷ 5 = $0.83 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $6.36 for a pack of 12, or at $3.60 for a pack of 6?

Answer: $6.36 for a pack of 12 ($0.53 per pencil)

  1. First: $6.36 ÷ 12 = $0.53 per pencil
  2. Second: $3.60 ÷ 6 = $0.60 per pencil
  3. The cheaper unit price is better value.
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