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Why do I keep getting the wrong answer when tackling percentage change questions?

Percentage change isn't always as simple as you think. Whilst taking into consideration if it is a percentage increase or decrease, you also need to consider whether you're calculating a result before or after the percentage change has taken place.

For example, are you working out the value of a £13500 car after a 15% depreciation, or are you working out the original value of a £800 sofa before it was in a 30% off sale? There are some tips that can be learnt to ensure you never get a percentage change question wrong ever again.

Answered by Emma S. • Maths tutor

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Why do I keep getting the wrong answer when tackling percentage change questions?

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Why do I keep getting the wrong answer when tackling percentage change questions?

Related Maths GCSE answers

Complete this substitution question: x^​3 - 25 = 103 - x^​3

Show that n²-n-90=0

Show that the recurring decimal 0.0151515..=1/66 (4H)

Show that (x+1)(x+2)(x+3) can be written in the form ax^3 +bx^2 + cx + d where a,b,c,d are positive integers.

Complete this substitution question: x^3 - 25 = 103 - x^3