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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 $3.90 for 500 g, or at $7.30 for 1 kg?

Answer: $7.30 for 1 kg ($0.73 per 100 g)

  1. First: $3.90 ÷ 5 = $0.78 per 100 g
  2. Second: $7.30 ÷ 10 = $0.73 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: oats at $8.60 for 1 kg, or at $13.20 for 2 kg?

Answer: $13.20 for 2 kg ($0.66 per 100 g)

  1. First: $8.60 ÷ 10 = $0.86 per 100 g
  2. Second: $13.20 ÷ 20 = $0.66 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: pasta at $0.80 for 250 g, or at $2.25 for 500 g?

Answer: $0.80 for 250 g ($0.32 per 100 g)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 g
  2. Second: $2.25 ÷ 5 = $0.45 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: rice at $1.50 for 1 kg, or at $4.40 for 2 kg?

Answer: $1.50 for 1 kg ($0.15 per 100 g)

  1. First: $1.50 ÷ 10 = $0.15 per 100 g
  2. Second: $4.40 ÷ 20 = $0.22 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $8.80 for 1 kg, or at $4.70 for 500 g?

Answer: $8.80 for 1 kg ($0.88 per 100 g)

  1. First: $8.80 ÷ 10 = $0.88 per 100 g
  2. Second: $4.70 ÷ 5 = $0.94 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $4.20 for 500 g, or at $7.20 for 1 kg?

Answer: $7.20 for 1 kg ($0.72 per 100 g)

  1. First: $4.20 ÷ 5 = $0.84 per 100 g
  2. Second: $7.20 ÷ 10 = $0.72 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $1.45 for 500 g, or at $2.40 for 1 kg?

Answer: $2.40 for 1 kg ($0.24 per 100 g)

  1. First: $1.45 ÷ 5 = $0.29 per 100 g
  2. Second: $2.40 ÷ 10 = $0.24 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: oats at $12.40 for 2 kg, or at $2.10 for 500 g?

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

  1. First: $12.40 ÷ 20 = $0.62 per 100 g
  2. Second: $2.10 ÷ 5 = $0.42 per 100 g
  3. The cheaper unit price is better value.
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