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Year 8 Best Buys and Unit Prices Worksheet — Level 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 — Answers

Find the price for the same amount of each (the unit price), then compare. Show your working.

1.Which is better value: juice at $6.80 for 1 L, or at $1.45 for 250 mL?

Answer: $1.45 for 250 mL ($0.58 per 100 mL)

  1. First: $6.80 ÷ 10 = $0.68 per 100 mL
  2. Second: $1.45 ÷ 2.5 = $0.58 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $2.22 for a pack of 6, or at $8.16 for a pack of 24?

Answer: $8.16 for a pack of 24 ($0.34 per pencil)

  1. First: $2.22 ÷ 6 = $0.37 per pencil
  2. Second: $8.16 ÷ 24 = $0.34 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $12.96 for a pack of 24, or at $6.84 for a pack of 12?

Answer: $12.96 for a pack of 24 ($0.54 per pencil)

  1. First: $12.96 ÷ 24 = $0.54 per pencil
  2. Second: $6.84 ÷ 12 = $0.57 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: juice at $0.40 for 250 mL, or at $2.50 for 1 L?

Answer: $0.40 for 250 mL ($0.16 per 100 mL)

  1. First: $0.40 ÷ 2.5 = $0.16 per 100 mL
  2. Second: $2.50 ÷ 10 = $0.25 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: pencils at $1.44 for a pack of 6, or at $9.84 for a pack of 24?

Answer: $1.44 for a pack of 6 ($0.24 per pencil)

  1. First: $1.44 ÷ 6 = $0.24 per pencil
  2. Second: $9.84 ÷ 24 = $0.41 per pencil
  3. The cheaper unit price is better value.
6.Which is better value: rice at $6.50 for 1 kg, or at $17.00 for 2 kg?

Answer: $6.50 for 1 kg ($0.65 per 100 g)

  1. First: $6.50 ÷ 10 = $0.65 per 100 g
  2. Second: $17.00 ÷ 20 = $0.85 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: oats at $1.95 for 500 g, or at $4.20 for 2 kg?

Answer: $4.20 for 2 kg ($0.21 per 100 g)

  1. First: $1.95 ÷ 5 = $0.39 per 100 g
  2. Second: $4.20 ÷ 20 = $0.21 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $14.40 for 2 kg, or at $4.25 for 500 g?

Answer: $14.40 for 2 kg ($0.72 per 100 g)

  1. First: $14.40 ÷ 20 = $0.72 per 100 g
  2. Second: $4.25 ÷ 5 = $0.85 per 100 g
  3. The cheaper unit price is better value.
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