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Year 9 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — Answers

Answer sheet with worked solutions for the Year 9 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Ratio & Rates

Year 9 Best Buys and Unit Prices Worksheet — Level 2 — 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: rice at $1.55 for 500 g, or at $4.00 for 1 kg?

Answer: $1.55 for 500 g ($0.31 per 100 g)

  1. First: $1.55 ÷ 5 = $0.31 per 100 g
  2. Second: $4.00 ÷ 10 = $0.40 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: rice at $3.30 for 1 kg, or at $1.35 for 500 g?

Answer: $1.35 for 500 g ($0.27 per 100 g)

  1. First: $3.30 ÷ 10 = $0.33 per 100 g
  2. Second: $1.35 ÷ 5 = $0.27 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: oats at $3.80 for 2 kg, or at $2.60 for 1 kg?

Answer: $3.80 for 2 kg ($0.19 per 100 g)

  1. First: $3.80 ÷ 20 = $0.19 per 100 g
  2. Second: $2.60 ÷ 10 = $0.26 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pasta at $7.50 for 1 kg, or at $3.30 for 500 g?

Answer: $3.30 for 500 g ($0.66 per 100 g)

  1. First: $7.50 ÷ 10 = $0.75 per 100 g
  2. Second: $3.30 ÷ 5 = $0.66 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $11.20 for 2 kg, or at $3.30 for 500 g?

Answer: $11.20 for 2 kg ($0.56 per 100 g)

  1. First: $11.20 ÷ 20 = $0.56 per 100 g
  2. Second: $3.30 ÷ 5 = $0.66 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $1.38 for a pack of 6, or at $7.68 for a pack of 24?

Answer: $1.38 for a pack of 6 ($0.23 per pencil)

  1. First: $1.38 ÷ 6 = $0.23 per pencil
  2. Second: $7.68 ÷ 24 = $0.32 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: rice at $6.50 for 1 kg, or at $16.40 for 2 kg?

Answer: $6.50 for 1 kg ($0.65 per 100 g)

  1. First: $6.50 ÷ 10 = $0.65 per 100 g
  2. Second: $16.40 ÷ 20 = $0.82 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $5.00 for 1 kg, or at $1.50 for 500 g?

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

  1. First: $5.00 ÷ 10 = $0.50 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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