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Year 9 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — 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 3 — 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 $2.70 for a pack of 6, or at $9.12 for a pack of 24?

Answer: $9.12 for a pack of 24 ($0.38 per pencil)

  1. First: $2.70 ÷ 6 = $0.45 per pencil
  2. Second: $9.12 ÷ 24 = $0.38 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: oats at $3.80 for 500 g, or at $17.40 for 2 kg?

Answer: $3.80 for 500 g ($0.76 per 100 g)

  1. First: $3.80 ÷ 5 = $0.76 per 100 g
  2. Second: $17.40 ÷ 20 = $0.87 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: oats at $11.80 for 2 kg, or at $7.10 for 1 kg?

Answer: $11.80 for 2 kg ($0.59 per 100 g)

  1. First: $11.80 ÷ 20 = $0.59 per 100 g
  2. Second: $7.10 ÷ 10 = $0.71 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $3.70 for 1 kg, or at $1.20 for 500 g?

Answer: $1.20 for 500 g ($0.24 per 100 g)

  1. First: $3.70 ÷ 10 = $0.37 per 100 g
  2. Second: $1.20 ÷ 5 = $0.24 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $14.20 for 2 kg, or at $3.70 for 500 g?

Answer: $14.20 for 2 kg ($0.71 per 100 g)

  1. First: $14.20 ÷ 20 = $0.71 per 100 g
  2. Second: $3.70 ÷ 5 = $0.74 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: juice at $9.80 for 2 L, or at $0.75 for 250 mL?

Answer: $0.75 for 250 mL ($0.30 per 100 mL)

  1. First: $9.80 ÷ 20 = $0.49 per 100 mL
  2. Second: $0.75 ÷ 2.5 = $0.30 per 100 mL
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $14.88 for a pack of 24, or at $2.70 for a pack of 6?

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

  1. First: $14.88 ÷ 24 = $0.62 per pencil
  2. Second: $2.70 ÷ 6 = $0.45 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: rice at $3.55 for 500 g, or at $6.20 for 1 kg?

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

  1. First: $3.55 ÷ 5 = $0.71 per 100 g
  2. Second: $6.20 ÷ 10 = $0.62 per 100 g
  3. The cheaper unit price is better value.
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