Revision Notes

What is an algebraic fraction?

An algebraic fraction is simply a fraction with an algebraic expression on the top (numerator) and/or the bottom (denominator).

Adding & subtracting

Rules same as numeric fractions:

  1. Find the lowest common bottom (denominator).
  2. Write fractions with new bottoms.
  3. Multiply tops by same thing as bottoms.
  4. Write as a single fraction (take care if subtracting)
  5. Simplify the top

Always leave your answer in as simple a form as possible

(See “Algebraic Fractions – Simplifying” for more on that)


Algebraic Fractions - Adding & Subtracting Example, IGCSE & GCSE Maths revision notes


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