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Year 9 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 2 — 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 3 — 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: pencils at $8.52 for a pack of 12, or at $3.42 for a pack of 6?

Answer: $3.42 for a pack of 6 ($0.57 per pencil)

  1. First: $8.52 ÷ 12 = $0.71 per pencil
  2. Second: $3.42 ÷ 6 = $0.57 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: rice at $3.50 for 500 g, or at $14.80 for 2 kg?

Answer: $3.50 for 500 g ($0.70 per 100 g)

  1. First: $3.50 ÷ 5 = $0.70 per 100 g
  2. Second: $14.80 ÷ 20 = $0.74 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: pasta at $1.60 for 1 kg, or at $0.65 for 250 g?

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

  1. First: $1.60 ÷ 10 = $0.16 per 100 g
  2. Second: $0.65 ÷ 2.5 = $0.26 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $5.88 for a pack of 12, or at $14.40 for a pack of 24?

Answer: $5.88 for a pack of 12 ($0.49 per pencil)

  1. First: $5.88 ÷ 12 = $0.49 per pencil
  2. Second: $14.40 ÷ 24 = $0.60 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: oats at $3.25 for 500 g, or at $15.40 for 2 kg?

Answer: $3.25 for 500 g ($0.65 per 100 g)

  1. First: $3.25 ÷ 5 = $0.65 per 100 g
  2. Second: $15.40 ÷ 20 = $0.77 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: rice at $3.00 for 2 kg, or at $1.00 for 500 g?

Answer: $3.00 for 2 kg ($0.15 per 100 g)

  1. First: $3.00 ÷ 20 = $0.15 per 100 g
  2. Second: $1.00 ÷ 5 = $0.20 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $4.32 for a pack of 12, or at $12.72 for a pack of 24?

Answer: $4.32 for a pack of 12 ($0.36 per pencil)

  1. First: $4.32 ÷ 12 = $0.36 per pencil
  2. Second: $12.72 ÷ 24 = $0.53 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: oats at $2.75 for 500 g, or at $7.80 for 2 kg?

Answer: $7.80 for 2 kg ($0.39 per 100 g)

  1. First: $2.75 ÷ 5 = $0.55 per 100 g
  2. Second: $7.80 ÷ 20 = $0.39 per 100 g
  3. The cheaper unit price is better value.
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