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Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — 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 2 — 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 $3.20 for 2 kg, or at $2.60 for 1 kg?

Answer: $3.20 for 2 kg ($0.16 per 100 g)

  1. First: $3.20 ÷ 20 = $0.16 per 100 g
  2. Second: $2.60 ÷ 10 = $0.26 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: juice at $0.80 for 250 mL, or at $2.00 for 1 L?

Answer: $2.00 for 1 L ($0.20 per 100 mL)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 mL
  2. Second: $2.00 ÷ 10 = $0.20 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: pasta at $1.70 for 500 g, or at $3.90 for 1 kg?

Answer: $1.70 for 500 g ($0.34 per 100 g)

  1. First: $1.70 ÷ 5 = $0.34 per 100 g
  2. Second: $3.90 ÷ 10 = $0.39 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $8.60 for 2 kg, or at $3.80 for 1 kg?

Answer: $3.80 for 1 kg ($0.38 per 100 g)

  1. First: $8.60 ÷ 20 = $0.43 per 100 g
  2. Second: $3.80 ÷ 10 = $0.38 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $5.90 for 1 kg, or at $3.70 for 500 g?

Answer: $5.90 for 1 kg ($0.59 per 100 g)

  1. First: $5.90 ÷ 10 = $0.59 per 100 g
  2. Second: $3.70 ÷ 5 = $0.74 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $1.95 for 500 g, or at $2.90 for 1 kg?

Answer: $2.90 for 1 kg ($0.29 per 100 g)

  1. First: $1.95 ÷ 5 = $0.39 per 100 g
  2. Second: $2.90 ÷ 10 = $0.29 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $5.16 for a pack of 6, or at $18.24 for a pack of 24?

Answer: $18.24 for a pack of 24 ($0.76 per pencil)

  1. First: $5.16 ÷ 6 = $0.86 per pencil
  2. Second: $18.24 ÷ 24 = $0.76 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: juice at $5.50 for 1 L, or at $8.40 for 2 L?

Answer: $8.40 for 2 L ($0.42 per 100 mL)

  1. First: $5.50 ÷ 10 = $0.55 per 100 mL
  2. Second: $8.40 ÷ 20 = $0.42 per 100 mL
  3. The cheaper unit price is better value.
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