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The Open University

Ratio, proportion and percentages

The Open University via OpenLearn

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Overview

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From politics to cookery, ratios, proportions and percentages are part of everyday life. This free course is designed to help you become more familiar with how figures can be manipulated, then you can check whether that discount really is as big as they claim!

Syllabus

  • Introduction
  • Learning outcomes
  • 1 Ratio
  • 1 Ratio
  • 1.1 Introduction
  • 1.2 Expressing ratios
  • 1.2.1 Try some yourself
  • 1.3 Using ratios
  • 1.3.1 Try some yourself
  • 1.4 Converting ratios from fractions to decimals
  • 1.4.1 Try some yourself
  • 1.5 Speeds
  • 1.5.1 Try some yourself
  • 2 Proportion
  • 2 Proportion
  • 2.1 Introduction
  • 2.2 Direct proportion
  • 2.2.1 Try some yourself
  • 2.3 Inverse proportion
  • 2.3.1 Try some yourself
  • 3 Percentages
  • 3 Percentages
  • 3.1 What are percentages?
  • 3.1.1 Try some yourself
  • 3.2 Converting to a percentage
  • 3.2.1 Try some yourself
  • 3.3 Percentage increase and decrease
  • 3.3.1 Increasing by a percentage
  • 3.3.2 Try some yourself
  • 3.4 Decreasing by a percentage
  • 3.4.1 Try some yourself
  • 3.5 More examples of percentages
  • 3.5.1 Try some yourself
  • 4 OpenMark quiz
  • 4 OpenMark quiz
  • Conclusion
  • Keep on learning
  • Acknowledgements

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