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Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — 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 — 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: pencils at $3.00 for a pack of 12, or at $9.60 for a pack of 24?

Answer: $3.00 for a pack of 12 ($0.25 per pencil)

  1. First: $3.00 ÷ 12 = $0.25 per pencil
  2. Second: $9.60 ÷ 24 = $0.40 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: juice at $8.70 for 1 L, or at $19.80 for 2 L?

Answer: $8.70 for 1 L ($0.87 per 100 mL)

  1. First: $8.70 ÷ 10 = $0.87 per 100 mL
  2. Second: $19.80 ÷ 20 = $0.99 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: juice at $1.30 for 250 mL, or at $5.70 for 1 L?

Answer: $1.30 for 250 mL ($0.52 per 100 mL)

  1. First: $1.30 ÷ 2.5 = $0.52 per 100 mL
  2. Second: $5.70 ÷ 10 = $0.57 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: oats at $10.40 for 2 kg, or at $7.00 for 1 kg?

Answer: $10.40 for 2 kg ($0.52 per 100 g)

  1. First: $10.40 ÷ 20 = $0.52 per 100 g
  2. Second: $7.00 ÷ 10 = $0.70 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $1.75 for 250 g, or at $8.90 for 1 kg?

Answer: $1.75 for 250 g ($0.70 per 100 g)

  1. First: $1.75 ÷ 2.5 = $0.70 per 100 g
  2. Second: $8.90 ÷ 10 = $0.89 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: juice at $3.30 for 1 L, or at $8.60 for 2 L?

Answer: $3.30 for 1 L ($0.33 per 100 mL)

  1. First: $3.30 ÷ 10 = $0.33 per 100 mL
  2. Second: $8.60 ÷ 20 = $0.43 per 100 mL
  3. The cheaper unit price is better value.
7.Which is better value: oats at $4.25 for 500 g, or at $15.40 for 2 kg?

Answer: $15.40 for 2 kg ($0.77 per 100 g)

  1. First: $4.25 ÷ 5 = $0.85 per 100 g
  2. Second: $15.40 ÷ 20 = $0.77 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $2.10 for 500 g, or at $4.70 for 1 kg?

Answer: $2.10 for 500 g ($0.42 per 100 g)

  1. First: $2.10 ÷ 5 = $0.42 per 100 g
  2. Second: $4.70 ÷ 10 = $0.47 per 100 g
  3. The cheaper unit price is better value.
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