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Year 7 Best Buys and Unit Prices Worksheet — Level 2 — 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 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: rice at $2.80 for 500 g, or at $10.20 for 2 kg?

Answer: $10.20 for 2 kg ($0.51 per 100 g)

  1. First: $2.80 ÷ 5 = $0.56 per 100 g
  2. Second: $10.20 ÷ 20 = $0.51 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: juice at $14.60 for 2 L, or at $9.30 for 1 L?

Answer: $14.60 for 2 L ($0.73 per 100 mL)

  1. First: $14.60 ÷ 20 = $0.73 per 100 mL
  2. Second: $9.30 ÷ 10 = $0.93 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: oats at $7.70 for 1 kg, or at $4.45 for 500 g?

Answer: $7.70 for 1 kg ($0.77 per 100 g)

  1. First: $7.70 ÷ 10 = $0.77 per 100 g
  2. Second: $4.45 ÷ 5 = $0.89 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $5.04 for a pack of 12, or at $13.92 for a pack of 24?

Answer: $5.04 for a pack of 12 ($0.42 per pencil)

  1. First: $5.04 ÷ 12 = $0.42 per pencil
  2. Second: $13.92 ÷ 24 = $0.58 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $7.90 for 1 kg, or at $4.55 for 500 g?

Answer: $7.90 for 1 kg ($0.79 per 100 g)

  1. First: $7.90 ÷ 10 = $0.79 per 100 g
  2. Second: $4.55 ÷ 5 = $0.91 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pasta at $1.95 for 250 g, or at $3.15 for 500 g?

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

  1. First: $1.95 ÷ 2.5 = $0.78 per 100 g
  2. Second: $3.15 ÷ 5 = $0.63 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $8.90 for 1 kg, or at $14.00 for 2 kg?

Answer: $14.00 for 2 kg ($0.70 per 100 g)

  1. First: $8.90 ÷ 10 = $0.89 per 100 g
  2. Second: $14.00 ÷ 20 = $0.70 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $3.70 for 1 kg, or at $1.50 for 500 g?

Answer: $1.50 for 500 g ($0.30 per 100 g)

  1. First: $3.70 ÷ 10 = $0.37 per 100 g
  2. Second: $1.50 ÷ 5 = $0.30 per 100 g
  3. The cheaper unit price is better value.
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