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Year 8 Best Buys and Unit Prices Worksheet — Level 3 — 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 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: oats at $3.00 for 1 kg, or at $0.70 for 500 g?

Answer: $0.70 for 500 g ($0.14 per 100 g)

  1. First: $3.00 ÷ 10 = $0.30 per 100 g
  2. Second: $0.70 ÷ 5 = $0.14 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: juice at $8.40 for 2 L, or at $1.10 for 250 mL?

Answer: $8.40 for 2 L ($0.42 per 100 mL)

  1. First: $8.40 ÷ 20 = $0.42 per 100 mL
  2. Second: $1.10 ÷ 2.5 = $0.44 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $18.72 for a pack of 24, or at $4.44 for a pack of 6?

Answer: $4.44 for a pack of 6 ($0.74 per pencil)

  1. First: $18.72 ÷ 24 = $0.78 per pencil
  2. Second: $4.44 ÷ 6 = $0.74 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: rice at $5.80 for 2 kg, or at $0.95 for 500 g?

Answer: $0.95 for 500 g ($0.19 per 100 g)

  1. First: $5.80 ÷ 20 = $0.29 per 100 g
  2. Second: $0.95 ÷ 5 = $0.19 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $0.50 for 250 g, or at $1.10 for 500 g?

Answer: $0.50 for 250 g ($0.20 per 100 g)

  1. First: $0.50 ÷ 2.5 = $0.20 per 100 g
  2. Second: $1.10 ÷ 5 = $0.22 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $1.00 for 500 g, or at $7.60 for 2 kg?

Answer: $1.00 for 500 g ($0.20 per 100 g)

  1. First: $1.00 ÷ 5 = $0.20 per 100 g
  2. Second: $7.60 ÷ 20 = $0.38 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $8.88 for a pack of 12, or at $19.68 for a pack of 24?

Answer: $8.88 for a pack of 12 ($0.74 per pencil)

  1. First: $8.88 ÷ 12 = $0.74 per pencil
  2. Second: $19.68 ÷ 24 = $0.82 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $3.78 for a pack of 6, or at $8.04 for a pack of 12?

Answer: $3.78 for a pack of 6 ($0.63 per pencil)

  1. First: $3.78 ÷ 6 = $0.63 per pencil
  2. Second: $8.04 ÷ 12 = $0.67 per pencil
  3. The cheaper unit price is better value.
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