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Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — 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 4 — 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 $1.60 for 250 mL, or at $11.40 for 2 L?

Answer: $11.40 for 2 L ($0.57 per 100 mL)

  1. First: $1.60 ÷ 2.5 = $0.64 per 100 mL
  2. Second: $11.40 ÷ 20 = $0.57 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: juice at $1.40 for 250 mL, or at $15.20 for 2 L?

Answer: $1.40 for 250 mL ($0.56 per 100 mL)

  1. First: $1.40 ÷ 2.5 = $0.56 per 100 mL
  2. Second: $15.20 ÷ 20 = $0.76 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $8.40 for a pack of 12, or at $18.48 for a pack of 24?

Answer: $8.40 for a pack of 12 ($0.70 per pencil)

  1. First: $8.40 ÷ 12 = $0.70 per pencil
  2. Second: $18.48 ÷ 24 = $0.77 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: oats at $15.60 for 2 kg, or at $7.50 for 1 kg?

Answer: $7.50 for 1 kg ($0.75 per 100 g)

  1. First: $15.60 ÷ 20 = $0.78 per 100 g
  2. Second: $7.50 ÷ 10 = $0.75 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: oats at $1.05 for 500 g, or at $1.40 for 1 kg?

Answer: $1.40 for 1 kg ($0.14 per 100 g)

  1. First: $1.05 ÷ 5 = $0.21 per 100 g
  2. Second: $1.40 ÷ 10 = $0.14 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 $4.10 for 1 L?

Answer: $4.10 for 1 L ($0.41 per 100 mL)

  1. First: $9.80 ÷ 20 = $0.49 per 100 mL
  2. Second: $4.10 ÷ 10 = $0.41 per 100 mL
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $6.48 for a pack of 12, or at $2.04 for a pack of 6?

Answer: $2.04 for a pack of 6 ($0.34 per pencil)

  1. First: $6.48 ÷ 12 = $0.54 per pencil
  2. Second: $2.04 ÷ 6 = $0.34 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: rice at $7.00 for 2 kg, or at $2.70 for 1 kg?

Answer: $2.70 for 1 kg ($0.27 per 100 g)

  1. First: $7.00 ÷ 20 = $0.35 per 100 g
  2. Second: $2.70 ÷ 10 = $0.27 per 100 g
  3. The cheaper unit price is better value.
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