equality of ratios
What equality of ratios means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.
Definitions of equality of ratios
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain equality of ratios in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: Pearson Edexcel
Two ratios are in proportion when they reduce to the same simplified ratio, so 3 : 4 and 9 : 12 are in proportion because both reduce to 3 : 4.
Two ratios are in proportion when they are equal, for example 2 : 3 and 10 : 15, because both simplify to the same ratio.
Topics that use equality of ratios
- Ratio, proportion and rates of change (AQA GCSE)
- Ratio, proportion and rates of change (Pearson Edexcel GCSE)
Related terms
- compound interest
- Compound Measure
- compound unit
- constant of proportionality
- Density
- direct proportion
- inverse proportion
- Multiplier
Using equality of ratios in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Mathematics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge