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Year 9 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 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 — 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: pasta at $4.25 for 500 g, or at $10.00 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: $10.00 ÷ 10 = $1.00 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $18.72 for a pack of 24, or at $8.40 for a pack of 12?

Answer: $8.40 for a pack of 12 ($0.70 per pencil)

  1. First: $18.72 ÷ 24 = $0.78 per pencil
  2. Second: $8.40 ÷ 12 = $0.70 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: oats at $4.20 for 2 kg, or at $3.10 for 1 kg?

Answer: $4.20 for 2 kg ($0.21 per 100 g)

  1. First: $4.20 ÷ 20 = $0.21 per 100 g
  2. Second: $3.10 ÷ 10 = $0.31 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $3.00 for a pack of 6, or at $9.84 for a pack of 24?

Answer: $9.84 for a pack of 24 ($0.41 per pencil)

  1. First: $3.00 ÷ 6 = $0.50 per pencil
  2. Second: $9.84 ÷ 24 = $0.41 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: juice at $2.70 for 1 L, or at $1.80 for 2 L?

Answer: $1.80 for 2 L ($0.09 per 100 mL)

  1. First: $2.70 ÷ 10 = $0.27 per 100 mL
  2. Second: $1.80 ÷ 20 = $0.09 per 100 mL
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $19.92 for a pack of 24, or at $11.52 for a pack of 12?

Answer: $19.92 for a pack of 24 ($0.83 per pencil)

  1. First: $19.92 ÷ 24 = $0.83 per pencil
  2. Second: $11.52 ÷ 12 = $0.96 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: oats at $3.70 for 1 kg, or at $0.85 for 500 g?

Answer: $0.85 for 500 g ($0.17 per 100 g)

  1. First: $3.70 ÷ 10 = $0.37 per 100 g
  2. Second: $0.85 ÷ 5 = $0.17 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: juice at $7.20 for 1 L, or at $2.15 for 250 mL?

Answer: $7.20 for 1 L ($0.72 per 100 mL)

  1. First: $7.20 ÷ 10 = $0.72 per 100 mL
  2. Second: $2.15 ÷ 2.5 = $0.86 per 100 mL
  3. The cheaper unit price is better value.
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