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Year 7 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — 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 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: pasta at $1.70 for 250 g, or at $7.80 for 1 kg?

Answer: $1.70 for 250 g ($0.68 per 100 g)

  1. First: $1.70 ÷ 2.5 = $0.68 per 100 g
  2. Second: $7.80 ÷ 10 = $0.78 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pasta at $2.50 for 1 kg, or at $1.70 for 500 g?

Answer: $2.50 for 1 kg ($0.25 per 100 g)

  1. First: $2.50 ÷ 10 = $0.25 per 100 g
  2. Second: $1.70 ÷ 5 = $0.34 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: juice at $1.60 for 250 mL, or at $13.80 for 2 L?

Answer: $1.60 for 250 mL ($0.64 per 100 mL)

  1. First: $1.60 ÷ 2.5 = $0.64 per 100 mL
  2. Second: $13.80 ÷ 20 = $0.69 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: pasta at $4.15 for 500 g, or at $9.00 for 1 kg?

Answer: $4.15 for 500 g ($0.83 per 100 g)

  1. First: $4.15 ÷ 5 = $0.83 per 100 g
  2. Second: $9.00 ÷ 10 = $0.90 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $3.15 for 500 g, or at $7.60 for 1 kg?

Answer: $3.15 for 500 g ($0.63 per 100 g)

  1. First: $3.15 ÷ 5 = $0.63 per 100 g
  2. Second: $7.60 ÷ 10 = $0.76 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $4.32 for a pack of 6, or at $8.04 for a pack of 12?

Answer: $8.04 for a pack of 12 ($0.67 per pencil)

  1. First: $4.32 ÷ 6 = $0.72 per pencil
  2. Second: $8.04 ÷ 12 = $0.67 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: oats at $2.20 for 500 g, or at $8.20 for 2 kg?

Answer: $8.20 for 2 kg ($0.41 per 100 g)

  1. First: $2.20 ÷ 5 = $0.44 per 100 g
  2. Second: $8.20 ÷ 20 = $0.41 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $9.60 for a pack of 12, or at $5.70 for a pack of 6?

Answer: $9.60 for a pack of 12 ($0.80 per pencil)

  1. First: $9.60 ÷ 12 = $0.80 per pencil
  2. Second: $5.70 ÷ 6 = $0.95 per pencil
  3. The cheaper unit price is better value.
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