Proportion vs Ratio
When to use each in English, with meaning, register, and examples.
| Proportion | Ratio | |
|---|---|---|
| Meaning | A part or share of something in relation to the whole. | The relationship between two numbers showing how much of one there is compared to the other. |
| CEFR level | B2 | C1 |
| Part of speech | noun | noun |
| Usage notes | Use 'proportion' to discuss ratios or relationships between different amounts. Often appropriate in mathematics, statistics, and discussions about fairness. Avoid in casual conversation when not discussing specific comparisons. | Used in mathematics, sciences, and discussions about comparisons. Avoid in casual conversation unless the context is clear. |
Frequently asked questions: Proportion vs Ratio
What's the difference between "Proportion" and "Ratio"?
"Proportion" means: A part or share of something in relation to the whole. "Ratio" means: The relationship between two numbers showing how much of one there is compared to the other.
When should I use "Proportion" and "Ratio"?
They can all be used in everyday English.
Are "Proportion" and "Ratio" the same CEFR level?
"Proportion" is at B2, "Ratio" is at C1 on the CEFR scale.