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Year 8 Best Buys and Unit Prices Worksheet — Level 2 — 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 2 — 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: oats at $7.20 for 1 kg, or at $13.40 for 2 kg?

Answer: $13.40 for 2 kg ($0.67 per 100 g)

  1. First: $7.20 ÷ 10 = $0.72 per 100 g
  2. Second: $13.40 ÷ 20 = $0.67 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: oats at $17.60 for 2 kg, or at $10.70 for 1 kg?

Answer: $17.60 for 2 kg ($0.88 per 100 g)

  1. First: $17.60 ÷ 20 = $0.88 per 100 g
  2. Second: $10.70 ÷ 10 = $1.07 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: oats at $2.70 for 1 kg, or at $2.20 for 2 kg?

Answer: $2.20 for 2 kg ($0.11 per 100 g)

  1. First: $2.70 ÷ 10 = $0.27 per 100 g
  2. Second: $2.20 ÷ 20 = $0.11 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: juice at $1.10 for 250 mL, or at $7.00 for 2 L?

Answer: $7.00 for 2 L ($0.35 per 100 mL)

  1. First: $1.10 ÷ 2.5 = $0.44 per 100 mL
  2. Second: $7.00 ÷ 20 = $0.35 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: rice at $9.60 for 2 kg, or at $6.30 for 1 kg?

Answer: $9.60 for 2 kg ($0.48 per 100 g)

  1. First: $9.60 ÷ 20 = $0.48 per 100 g
  2. Second: $6.30 ÷ 10 = $0.63 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: rice at $6.80 for 2 kg, or at $1.40 for 500 g?

Answer: $1.40 for 500 g ($0.28 per 100 g)

  1. First: $6.80 ÷ 20 = $0.34 per 100 g
  2. Second: $1.40 ÷ 5 = $0.28 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: juice at $1.35 for 250 mL, or at $3.90 for 1 L?

Answer: $3.90 for 1 L ($0.39 per 100 mL)

  1. First: $1.35 ÷ 2.5 = $0.54 per 100 mL
  2. Second: $3.90 ÷ 10 = $0.39 per 100 mL
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $14.40 for a pack of 24, or at $4.56 for a pack of 6?

Answer: $14.40 for a pack of 24 ($0.60 per pencil)

  1. First: $14.40 ÷ 24 = $0.60 per pencil
  2. Second: $4.56 ÷ 6 = $0.76 per pencil
  3. The cheaper unit price is better value.
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