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Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 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 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: oats at $7.40 for 1 kg, or at $13.80 for 2 kg?

Answer: $13.80 for 2 kg ($0.69 per 100 g)

  1. First: $7.40 ÷ 10 = $0.74 per 100 g
  2. Second: $13.80 ÷ 20 = $0.69 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $7.44 for a pack of 12, or at $4.80 for a pack of 6?

Answer: $7.44 for a pack of 12 ($0.62 per pencil)

  1. First: $7.44 ÷ 12 = $0.62 per pencil
  2. Second: $4.80 ÷ 6 = $0.80 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: pasta at $1.30 for 500 g, or at $0.95 for 250 g?

Answer: $1.30 for 500 g ($0.26 per 100 g)

  1. First: $1.30 ÷ 5 = $0.26 per 100 g
  2. Second: $0.95 ÷ 2.5 = $0.38 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $4.25 for 500 g, or at $8.90 for 1 kg?

Answer: $4.25 for 500 g ($0.85 per 100 g)

  1. First: $4.25 ÷ 5 = $0.85 per 100 g
  2. Second: $8.90 ÷ 10 = $0.89 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $2.30 for 1 kg, or at $0.90 for 500 g?

Answer: $0.90 for 500 g ($0.18 per 100 g)

  1. First: $2.30 ÷ 10 = $0.23 per 100 g
  2. Second: $0.90 ÷ 5 = $0.18 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $5.52 for a pack of 12, or at $1.74 for a pack of 6?

Answer: $1.74 for a pack of 6 ($0.29 per pencil)

  1. First: $5.52 ÷ 12 = $0.46 per pencil
  2. Second: $1.74 ÷ 6 = $0.29 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: juice at $10.80 for 2 L, or at $5.80 for 1 L?

Answer: $10.80 for 2 L ($0.54 per 100 mL)

  1. First: $10.80 ÷ 20 = $0.54 per 100 mL
  2. Second: $5.80 ÷ 10 = $0.58 per 100 mL
  3. The cheaper unit price is better value.
8.Which is better value: juice at $15.80 for 2 L, or at $9.50 for 1 L?

Answer: $15.80 for 2 L ($0.79 per 100 mL)

  1. First: $15.80 ÷ 20 = $0.79 per 100 mL
  2. Second: $9.50 ÷ 10 = $0.95 per 100 mL
  3. The cheaper unit price is better value.
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