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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: rice at $4.25 for 500 g, or at $17.80 for 2 kg?

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

  1. First: $4.25 ÷ 5 = $0.85 per 100 g
  2. Second: $17.80 ÷ 20 = $0.89 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $1.32 for a pack of 6, or at $2.88 for a pack of 24?

Answer: $2.88 for a pack of 24 ($0.12 per pencil)

  1. First: $1.32 ÷ 6 = $0.22 per pencil
  2. Second: $2.88 ÷ 24 = $0.12 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $20.16 for a pack of 24, or at $11.28 for a pack of 12?

Answer: $20.16 for a pack of 24 ($0.84 per pencil)

  1. First: $20.16 ÷ 24 = $0.84 per pencil
  2. Second: $11.28 ÷ 12 = $0.94 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: rice at $3.35 for 500 g, or at $12.20 for 2 kg?

Answer: $12.20 for 2 kg ($0.61 per 100 g)

  1. First: $3.35 ÷ 5 = $0.67 per 100 g
  2. Second: $12.20 ÷ 20 = $0.61 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $1.80 for 1 kg, or at $0.75 for 500 g?

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

  1. First: $1.80 ÷ 10 = $0.18 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: oats at $4.50 for 500 g, or at $8.00 for 1 kg?

Answer: $8.00 for 1 kg ($0.80 per 100 g)

  1. First: $4.50 ÷ 5 = $0.90 per 100 g
  2. Second: $8.00 ÷ 10 = $0.80 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: oats at $3.65 for 500 g, or at $9.10 for 1 kg?

Answer: $3.65 for 500 g ($0.73 per 100 g)

  1. First: $3.65 ÷ 5 = $0.73 per 100 g
  2. Second: $9.10 ÷ 10 = $0.91 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $12.40 for 2 kg, or at $2.30 for 500 g?

Answer: $2.30 for 500 g ($0.46 per 100 g)

  1. First: $12.40 ÷ 20 = $0.62 per 100 g
  2. Second: $2.30 ÷ 5 = $0.46 per 100 g
  3. The cheaper unit price is better value.
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