GCSE Maths Percentage Mistakes
Percentages are common in GCSE Maths exams and often appear in real-life word problems involving prices, interest and change.
Common Percentage Errors
- Using the wrong multiplier
- Confusing increase and decrease
- Finding a percentage of the wrong amount
- Using ordinary percentage methods for reverse percentages
Exam tip: For percentage change, always identify the original amount first.
Common mistake: A 20% decrease followed by a 20% increase does not return to the original value.
Video explanation
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