0580/21 Oct/Nov 2021, Question 12: Percentage Increases and Decreases
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Calculator · 3 marks
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The question, in short
Calculate the overall percentage change in an investment after a 35% fall in year one and a 40% rise in year two on the reduced value.
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Solution · 3 marks
- 1Multiplier = (1 − 35/100) × (1 + 40/100)
- 2= 0.65 × 1.4 = 0.91
- 30.91 − 1 = −0.09
- 4Percentage change = −9%
Answer−9
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