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Year 7 Best Buys and Unit Prices Worksheet — Level 3 — 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 3 — 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: juice at $1.05 for 250 mL, or at $2.20 for 1 L?

Answer: $2.20 for 1 L ($0.22 per 100 mL)

  1. First: $1.05 ÷ 2.5 = $0.42 per 100 mL
  2. Second: $2.20 ÷ 10 = $0.22 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: oats at $1.90 for 500 g, or at $3.30 for 1 kg?

Answer: $3.30 for 1 kg ($0.33 per 100 g)

  1. First: $1.90 ÷ 5 = $0.38 per 100 g
  2. Second: $3.30 ÷ 10 = $0.33 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 $1.60 for 1 kg?

Answer: $1.60 for 1 kg ($0.16 per 100 g)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 g
  2. Second: $1.60 ÷ 10 = $0.16 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $1.50 for 500 g, or at $9.00 for 2 kg?

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

  1. First: $1.50 ÷ 5 = $0.30 per 100 g
  2. Second: $9.00 ÷ 20 = $0.45 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: oats at $14.80 for 2 kg, or at $4.25 for 500 g?

Answer: $14.80 for 2 kg ($0.74 per 100 g)

  1. First: $14.80 ÷ 20 = $0.74 per 100 g
  2. Second: $4.25 ÷ 5 = $0.85 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $14.40 for 2 kg, or at $5.70 for 1 kg?

Answer: $5.70 for 1 kg ($0.57 per 100 g)

  1. First: $14.40 ÷ 20 = $0.72 per 100 g
  2. Second: $5.70 ÷ 10 = $0.57 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: oats at $7.70 for 1 kg, or at $2.95 for 500 g?

Answer: $2.95 for 500 g ($0.59 per 100 g)

  1. First: $7.70 ÷ 10 = $0.77 per 100 g
  2. Second: $2.95 ÷ 5 = $0.59 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 $7.30 for 1 kg?

Answer: $12.40 for 2 kg ($0.62 per 100 g)

  1. First: $12.40 ÷ 20 = $0.62 per 100 g
  2. Second: $7.30 ÷ 10 = $0.73 per 100 g
  3. The cheaper unit price is better value.
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