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Cambridge IGCSE Mathematics

1.13Percentages

Percentages in Cambridge IGCSE Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic60 practice questions3 lessons

Learning objectives

What the syllabus expects you to be able to do.

  1. 1.13.1Find a percentage of a quantity and write one quantity as a percentage of another.
  2. 1.13.2Calculate percentage increases and decreases in contexts such as profit and loss, discounts, deposits and earnings, including percentages over 100%.
  3. 1.13.3Calculate simple interest and compound interest without being given a formula.
  4. 1.13.4Extended: use reverse percentages to find an original amount, and work with repeated percentage changes.

Lessons

  • Percentages

    35 min

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  • Profit, loss, discount, commission and hire purchase

    35 min

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  • Simple and compound interest

    35 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Percentages: sample question

1 mark

Chipo buys a box of oranges for US$12 and sells the oranges for a total of US$15. Calculate her percentage profit.

Answer in %.

Turn Percentages into a strength.

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