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Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — 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 3 — Practice Set 3 — 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 $13.20 for a pack of 24, or at $7.08 for a pack of 12?

Answer: $13.20 for a pack of 24 ($0.55 per pencil)

  1. First: $13.20 ÷ 24 = $0.55 per pencil
  2. Second: $7.08 ÷ 12 = $0.59 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: juice at $5.60 for 2 L, or at $1.60 for 1 L?

Answer: $1.60 for 1 L ($0.16 per 100 mL)

  1. First: $5.60 ÷ 20 = $0.28 per 100 mL
  2. Second: $1.60 ÷ 10 = $0.16 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: oats at $17.80 for 2 kg, or at $4.10 for 500 g?

Answer: $4.10 for 500 g ($0.82 per 100 g)

  1. First: $17.80 ÷ 20 = $0.89 per 100 g
  2. Second: $4.10 ÷ 5 = $0.82 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $3.20 for 1 kg, or at $7.60 for 2 kg?

Answer: $3.20 for 1 kg ($0.32 per 100 g)

  1. First: $3.20 ÷ 10 = $0.32 per 100 g
  2. Second: $7.60 ÷ 20 = $0.38 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $6.40 for 2 kg, or at $0.75 for 500 g?

Answer: $0.75 for 500 g ($0.15 per 100 g)

  1. First: $6.40 ÷ 20 = $0.32 per 100 g
  2. Second: $0.75 ÷ 5 = $0.15 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $12.24 for a pack of 24, or at $5.40 for a pack of 12?

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

  1. First: $12.24 ÷ 24 = $0.51 per pencil
  2. Second: $5.40 ÷ 12 = $0.45 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: pasta at $0.50 for 250 g, or at $3.80 for 1 kg?

Answer: $0.50 for 250 g ($0.20 per 100 g)

  1. First: $0.50 ÷ 2.5 = $0.20 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: rice at $8.40 for 2 kg, or at $1.85 for 500 g?

Answer: $1.85 for 500 g ($0.37 per 100 g)

  1. First: $8.40 ÷ 20 = $0.42 per 100 g
  2. Second: $1.85 ÷ 5 = $0.37 per 100 g
  3. The cheaper unit price is better value.
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