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Year 9 Best Buys and Unit Prices Worksheet — Level 2 — 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 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 $9.12 for a pack of 24, or at $2.76 for a pack of 12?

Answer: $2.76 for a pack of 12 ($0.23 per pencil)

  1. First: $9.12 ÷ 24 = $0.38 per pencil
  2. Second: $2.76 ÷ 12 = $0.23 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $15.12 for a pack of 24, or at $4.68 for a pack of 6?

Answer: $15.12 for a pack of 24 ($0.63 per pencil)

  1. First: $15.12 ÷ 24 = $0.63 per pencil
  2. Second: $4.68 ÷ 6 = $0.78 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: oats at $2.00 for 1 kg, or at $1.50 for 500 g?

Answer: $2.00 for 1 kg ($0.20 per 100 g)

  1. First: $2.00 ÷ 10 = $0.20 per 100 g
  2. Second: $1.50 ÷ 5 = $0.30 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: juice at $0.70 for 250 mL, or at $2.60 for 2 L?

Answer: $2.60 for 2 L ($0.13 per 100 mL)

  1. First: $0.70 ÷ 2.5 = $0.28 per 100 mL
  2. Second: $2.60 ÷ 20 = $0.13 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: juice at $3.20 for 2 L, or at $0.90 for 1 L?

Answer: $0.90 for 1 L ($0.09 per 100 mL)

  1. First: $3.20 ÷ 20 = $0.16 per 100 mL
  2. Second: $0.90 ÷ 10 = $0.09 per 100 mL
  3. The cheaper unit price is better value.
6.Which is better value: rice at $7.60 for 2 kg, or at $4.40 for 1 kg?

Answer: $7.60 for 2 kg ($0.38 per 100 g)

  1. First: $7.60 ÷ 20 = $0.38 per 100 g
  2. Second: $4.40 ÷ 10 = $0.44 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pasta at $1.80 for 500 g, or at $2.70 for 1 kg?

Answer: $2.70 for 1 kg ($0.27 per 100 g)

  1. First: $1.80 ÷ 5 = $0.36 per 100 g
  2. Second: $2.70 ÷ 10 = $0.27 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $2.40 for 1 kg, or at $0.60 for 500 g?

Answer: $0.60 for 500 g ($0.12 per 100 g)

  1. First: $2.40 ÷ 10 = $0.24 per 100 g
  2. Second: $0.60 ÷ 5 = $0.12 per 100 g
  3. The cheaper unit price is better value.
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