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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: pencils at $16.08 for a pack of 24, or at $6.48 for a pack of 12?

Answer: $6.48 for a pack of 12 ($0.54 per pencil)

  1. First: $16.08 ÷ 24 = $0.67 per pencil
  2. Second: $6.48 ÷ 12 = $0.54 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $2.40 for a pack of 12, or at $0.78 for a pack of 6?

Answer: $0.78 for a pack of 6 ($0.13 per pencil)

  1. First: $2.40 ÷ 12 = $0.20 per pencil
  2. Second: $0.78 ÷ 6 = $0.13 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: rice at $6.20 for 1 kg, or at $13.00 for 2 kg?

Answer: $6.20 for 1 kg ($0.62 per 100 g)

  1. First: $6.20 ÷ 10 = $0.62 per 100 g
  2. Second: $13.00 ÷ 20 = $0.65 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: juice at $2.00 for 1 L, or at $7.40 for 2 L?

Answer: $2.00 for 1 L ($0.20 per 100 mL)

  1. First: $2.00 ÷ 10 = $0.20 per 100 mL
  2. Second: $7.40 ÷ 20 = $0.37 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: rice at $2.10 for 500 g, or at $8.80 for 2 kg?

Answer: $2.10 for 500 g ($0.42 per 100 g)

  1. First: $2.10 ÷ 5 = $0.42 per 100 g
  2. Second: $8.80 ÷ 20 = $0.44 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $17.20 for 2 kg, or at $7.80 for 1 kg?

Answer: $7.80 for 1 kg ($0.78 per 100 g)

  1. First: $17.20 ÷ 20 = $0.86 per 100 g
  2. Second: $7.80 ÷ 10 = $0.78 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $8.00 for 2 kg, or at $1.40 for 500 g?

Answer: $1.40 for 500 g ($0.28 per 100 g)

  1. First: $8.00 ÷ 20 = $0.40 per 100 g
  2. Second: $1.40 ÷ 5 = $0.28 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: rice at $15.20 for 2 kg, or at $8.90 for 1 kg?

Answer: $15.20 for 2 kg ($0.76 per 100 g)

  1. First: $15.20 ÷ 20 = $0.76 per 100 g
  2. Second: $8.90 ÷ 10 = $0.89 per 100 g
  3. The cheaper unit price is better value.
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