4MA1/2HR Jan 2023, Question 13: Percentage Increases and Decreases
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2HR (Higher) · Calculator · 3 marks
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The question, in short
Find the percentage decrease in a rectangle's area when its length L rises by 20% and its width W falls by 35%.
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Solution · 3 marks
- 1Length up 20%: multiply by 1.2. Width down 35%: multiply by 0.65.
- 2New area = 1.2 × 0.65 = 0.78 of the old area.
- 3Percentage reduction = (1 − 0.78) × 100 = 22
Answer22
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