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Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Answers

Answer sheet with worked solutions for the Year 7 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Ratio & Rates

Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Answers

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

1.Which is better value: pasta at $1.60 for 250 g, or at $5.00 for 1 kg?

Answer: $5.00 for 1 kg ($0.50 per 100 g)

  1. First: $1.60 ÷ 2.5 = $0.64 per 100 g
  2. Second: $5.00 ÷ 10 = $0.50 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $6.00 for a pack of 24, or at $5.16 for a pack of 12?

Answer: $6.00 for a pack of 24 ($0.25 per pencil)

  1. First: $6.00 ÷ 24 = $0.25 per pencil
  2. Second: $5.16 ÷ 12 = $0.43 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: juice at $13.00 for 2 L, or at $7.80 for 1 L?

Answer: $13.00 for 2 L ($0.65 per 100 mL)

  1. First: $13.00 ÷ 20 = $0.65 per 100 mL
  2. Second: $7.80 ÷ 10 = $0.78 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: pasta at $4.90 for 1 kg, or at $3.35 for 500 g?

Answer: $4.90 for 1 kg ($0.49 per 100 g)

  1. First: $4.90 ÷ 10 = $0.49 per 100 g
  2. Second: $3.35 ÷ 5 = $0.67 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pencils at $5.34 for a pack of 6, or at $12.60 for a pack of 12?

Answer: $5.34 for a pack of 6 ($0.89 per pencil)

  1. First: $5.34 ÷ 6 = $0.89 per pencil
  2. Second: $12.60 ÷ 12 = $1.05 per pencil
  3. The cheaper unit price is better value.
6.Which is better value: rice at $3.60 for 500 g, or at $5.40 for 1 kg?

Answer: $5.40 for 1 kg ($0.54 per 100 g)

  1. First: $3.60 ÷ 5 = $0.72 per 100 g
  2. Second: $5.40 ÷ 10 = $0.54 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: juice at $3.50 for 1 L, or at $9.20 for 2 L?

Answer: $3.50 for 1 L ($0.35 per 100 mL)

  1. First: $3.50 ÷ 10 = $0.35 per 100 mL
  2. Second: $9.20 ÷ 20 = $0.46 per 100 mL
  3. The cheaper unit price is better value.
8.Which is better value: oats at $8.80 for 1 kg, or at $15.80 for 2 kg?

Answer: $15.80 for 2 kg ($0.79 per 100 g)

  1. First: $8.80 ÷ 10 = $0.88 per 100 g
  2. Second: $15.80 ÷ 20 = $0.79 per 100 g
  3. The cheaper unit price is better value.
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