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Year 8 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — Answers

Answer sheet with worked solutions for the Year 8 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Ratio & Rates

Year 8 Best Buys and Unit Prices Worksheet — Level 2 — 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: rice at $4.35 for 500 g, or at $14.60 for 2 kg?

Answer: $14.60 for 2 kg ($0.73 per 100 g)

  1. First: $4.35 ÷ 5 = $0.87 per 100 g
  2. Second: $14.60 ÷ 20 = $0.73 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: rice at $4.00 for 500 g, or at $14.80 for 2 kg?

Answer: $14.80 for 2 kg ($0.74 per 100 g)

  1. First: $4.00 ÷ 5 = $0.80 per 100 g
  2. Second: $14.80 ÷ 20 = $0.74 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: oats at $4.10 for 1 kg, or at $12.00 for 2 kg?

Answer: $4.10 for 1 kg ($0.41 per 100 g)

  1. First: $4.10 ÷ 10 = $0.41 per 100 g
  2. Second: $12.00 ÷ 20 = $0.60 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $7.10 for 1 kg, or at $11.60 for 2 kg?

Answer: $11.60 for 2 kg ($0.58 per 100 g)

  1. First: $7.10 ÷ 10 = $0.71 per 100 g
  2. Second: $11.60 ÷ 20 = $0.58 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pencils at $1.80 for a pack of 12, or at $6.00 for a pack of 24?

Answer: $1.80 for a pack of 12 ($0.15 per pencil)

  1. First: $1.80 ÷ 12 = $0.15 per pencil
  2. Second: $6.00 ÷ 24 = $0.25 per pencil
  3. The cheaper unit price is better value.
6.Which is better value: rice at $2.00 for 500 g, or at $4.90 for 1 kg?

Answer: $2.00 for 500 g ($0.40 per 100 g)

  1. First: $2.00 ÷ 5 = $0.40 per 100 g
  2. Second: $4.90 ÷ 10 = $0.49 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $5.80 for 2 kg, or at $0.50 for 500 g?

Answer: $0.50 for 500 g ($0.10 per 100 g)

  1. First: $5.80 ÷ 20 = $0.29 per 100 g
  2. Second: $0.50 ÷ 5 = $0.10 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $2.60 for 1 kg, or at $0.55 for 500 g?

Answer: $0.55 for 500 g ($0.11 per 100 g)

  1. First: $2.60 ÷ 10 = $0.26 per 100 g
  2. Second: $0.55 ÷ 5 = $0.11 per 100 g
  3. The cheaper unit price is better value.
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