Mathematics GCSE
common denominator
What common denominator means in Mathematics GCSE, as defined for Pearson Edexcel.
Definition of common denominator
Check what you remember
Read the wording for your board, then hide it and explain common denominator in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: Pearson Edexcel
Fractions are compared by rewriting them over this, so 3/5 and 4/7 become 21/35 and 20/35, which puts 3/5 ahead.
Topics that use common denominator
- Number - Structure and calculation (Pearson Edexcel GCSE)
Related terms
- Base
- cancelling common factors
- Circumference
- Counting without replacement
- denominator
- equivalent fractions
- Error interval
- estimating roots
Using common denominator in the exam
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