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Year 9 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — Answers

Answer sheet with worked solutions for the Year 9 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Ratio & Rates

Year 9 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — Answers

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

1.Which is better value: juice at $1.45 for 250 mL, or at $3.90 for 1 L?

Answer: $3.90 for 1 L ($0.39 per 100 mL)

  1. First: $1.45 ÷ 2.5 = $0.58 per 100 mL
  2. Second: $3.90 ÷ 10 = $0.39 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $13.92 for a pack of 24, or at $4.68 for a pack of 12?

Answer: $4.68 for a pack of 12 ($0.39 per pencil)

  1. First: $13.92 ÷ 24 = $0.58 per pencil
  2. Second: $4.68 ÷ 12 = $0.39 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: pasta at $4.05 for 500 g, or at $7.60 for 1 kg?

Answer: $7.60 for 1 kg ($0.76 per 100 g)

  1. First: $4.05 ÷ 5 = $0.81 per 100 g
  2. Second: $7.60 ÷ 10 = $0.76 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $2.70 for a pack of 6, or at $7.32 for a pack of 12?

Answer: $2.70 for a pack of 6 ($0.45 per pencil)

  1. First: $2.70 ÷ 6 = $0.45 per pencil
  2. Second: $7.32 ÷ 12 = $0.61 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: rice at $4.60 for 1 kg, or at $3.10 for 500 g?

Answer: $4.60 for 1 kg ($0.46 per 100 g)

  1. First: $4.60 ÷ 10 = $0.46 per 100 g
  2. Second: $3.10 ÷ 5 = $0.62 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $1.92 for a pack of 6, or at $3.84 for a pack of 24?

Answer: $3.84 for a pack of 24 ($0.16 per pencil)

  1. First: $1.92 ÷ 6 = $0.32 per pencil
  2. Second: $3.84 ÷ 24 = $0.16 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: rice at $7.00 for 2 kg, or at $2.55 for 500 g?

Answer: $7.00 for 2 kg ($0.35 per 100 g)

  1. First: $7.00 ÷ 20 = $0.35 per 100 g
  2. Second: $2.55 ÷ 5 = $0.51 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $15.36 for a pack of 24, or at $9.24 for a pack of 12?

Answer: $15.36 for a pack of 24 ($0.64 per pencil)

  1. First: $15.36 ÷ 24 = $0.64 per pencil
  2. Second: $9.24 ÷ 12 = $0.77 per pencil
  3. The cheaper unit price is better value.
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