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Percentage Change
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Original value and percentage change

Original value and percentage change

Bar models showing original value £80, increase to £100 and decrease to £60, with the £20 change highlighted and the formula percentage change = change/original × 100

A percentage change measures how much something goes up or down compared with the amount you started with. That starting amount is called the original value.

Percentage Change Lesson

  1. GCSE
  2. /Maths
  3. /Percentage Change

Step-by-step lessons on CCEA GCSE Maths Percentage Change. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.