0580/43 Oct/Nov 2023, Question 2: Expressing One Quantity as a Percentage

Part (a) · 2 marks

Find the percentage of all the birds that are Starlings, using the frequencies in the table.

1. 1Total = 8 + 6 + 11 + 5 = 30 birds
2. 211/30 × 100 = 36.66… ≈ 36.7%

Answer36.7 or 36.66 to 36.67 or 36 2/3

Part (bi) · 2 marks

Complete the pie chart sector angle column for Jay, Starling and Robin in the table.

1. 1360 ÷ 30 = 12° per bird (check: 8 × 12 = 96°)
2. 2Jay = 6 × 12 = 72°, Starling = 11 × 12 = 132°, Robin = 5 × 12 = 60°

Answer72, 132 and 60

Part (bii) · 2 marks

Complete the pie chart, which already shows the Goldfinch sector, using the table data.

1. 1Goldfinch: 96° for 8 birds, so each bird = 96 ÷ 8 = 12°.
2. 2Jay = 6 × 12 = 72°, Starling = 11 × 12 = 132°, Robin = 5 × 12 = 60°.
3. 3Draw these sectors next to the Goldfinch sector and label each: correct pie chart drawn

AnswerCorrect pie chart drawn

Part (c) · 2 marks

Calculate Tuesday's Goldfinch count after Monday's 8 increases by 262.5%.

1. 1Multiplier = 1 + 262.5/100 = 3.625
2. 28 × 3.625 = 29 Goldfinches

Answer29

Part (di) · 1 mark

Write 1500 million in standard form.

1. 11500 million = 1 500 000 000 = 1.5 × 10⁹

Answer1.5 × 10⁹

Part (dii) · 2 marks

Work out the average number of Red-Billed Quelea per square kilometre given 1500 million birds over 21.2 million square kilometres.

1. 11500 million ÷ 21.2 million = 1500 ÷ 21.2
2. 2= 70.75… ≈ 70.8 birds per km²

Answer70.8 or 70.75…

More past-paper questions on expressing one quantity as a percentage

• 0580/23 May/Jun 2026 Q1 · 2 marks
• 0580/31 May/Jun 2026 Q5 · 3 marks
• 0580/33 May/Jun 2026 Q11 · 7 marks
• 0580/32 May/Jun 2025 Q5 · 1 mark
• 0580/12 Oct/Nov 2025 Q11 · 6 marks
• 0580/31 Oct/Nov 2025 Q11 · 3 marks