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0580/11 May/Jun 2026, Question 5: Converting Fractions to Decimals

Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Non-calculator · 3 marks

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The question, in short

Convert between fractions, decimals and percentages: change 1/2 to a decimal, 9/10 to a percentage, and 0.15 to a fraction in simplest form.

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

Part (a) · 1 mark

Express the fraction 1/2 as a decimal.

  1. 11 ÷ 2 = 0.5

Answer0.5

Part (b) · 1 mark

Express the fraction 9/10 as a percentage.

  1. 19/10 = 90/100
  2. 2= 90%

Answer90

Part (c) · 1 mark

Express 0.15 as a fraction in its simplest form.

  1. 10.15 = 15/100
  2. 2Divide top and bottom by 5: 3/20

Answer3/20

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