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4024/23 May/Jun 2026, Question 14: Reverse Percentages

Cambridge O Level Mathematics 4024 · Paper 23 (Calculator) · Calculator · 2 marks

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The question, in short

A computer's cost drops 18% in a sale, leaving a sale price of $303.40. Work out what the computer cost originally, before the reduction.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Solution · 2 marks

  1. 1Sale price is 100 − 18 = 82% of the original
  2. 2Original = 303.40 ÷ 0.82
  3. 3= $370

Answer370

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