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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: oats at $3.50 for 1 kg, or at $6.00 for 2 kg?

Answer: $6.00 for 2 kg ($0.30 per 100 g)

  1. First: $3.50 ÷ 10 = $0.35 per 100 g
  2. Second: $6.00 ÷ 20 = $0.30 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: rice at $12.00 for 2 kg, or at $4.40 for 1 kg?

Answer: $4.40 for 1 kg ($0.44 per 100 g)

  1. First: $12.00 ÷ 20 = $0.60 per 100 g
  2. Second: $4.40 ÷ 10 = $0.44 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: oats at $11.60 for 2 kg, or at $4.40 for 1 kg?

Answer: $4.40 for 1 kg ($0.44 per 100 g)

  1. First: $11.60 ÷ 20 = $0.58 per 100 g
  2. Second: $4.40 ÷ 10 = $0.44 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $1.70 for 500 g, or at $10.60 for 2 kg?

Answer: $1.70 for 500 g ($0.34 per 100 g)

  1. First: $1.70 ÷ 5 = $0.34 per 100 g
  2. Second: $10.60 ÷ 20 = $0.53 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: oats at $6.80 for 1 kg, or at $12.60 for 2 kg?

Answer: $12.60 for 2 kg ($0.63 per 100 g)

  1. First: $6.80 ÷ 10 = $0.68 per 100 g
  2. Second: $12.60 ÷ 20 = $0.63 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $4.56 for a pack of 12, or at $6.72 for a pack of 24?

Answer: $6.72 for a pack of 24 ($0.28 per pencil)

  1. First: $4.56 ÷ 12 = $0.38 per pencil
  2. Second: $6.72 ÷ 24 = $0.28 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: oats at $1.75 for 500 g, or at $8.00 for 2 kg?

Answer: $1.75 for 500 g ($0.35 per 100 g)

  1. First: $1.75 ÷ 5 = $0.35 per 100 g
  2. Second: $8.00 ÷ 20 = $0.40 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: juice at $12.00 for 2 L, or at $1.20 for 250 mL?

Answer: $1.20 for 250 mL ($0.48 per 100 mL)

  1. First: $12.00 ÷ 20 = $0.60 per 100 mL
  2. Second: $1.20 ÷ 2.5 = $0.48 per 100 mL
  3. The cheaper unit price is better value.
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