Fraction vs Ratio

When to use each in English, with meaning, register, and examples.

 FractionRatio
MeaningA part of a whole, often shown as a number with a top and a bottom.The relationship between two numbers showing how much of one there is compared to the other.
CEFR levelB2C1
Part of speechnounnoun
Usage notesUsed in math and everyday situations to describe dividing things. It may not be used in casual conversations unless discussing specific math topics.Used in mathematics, sciences, and discussions about comparisons. Avoid in casual conversation unless the context is clear.

Frequently asked questions: Fraction vs Ratio

What's the difference between "Fraction" and "Ratio"?

"Fraction" means: A part of a whole, often shown as a number with a top and a bottom. "Ratio" means: The relationship between two numbers showing how much of one there is compared to the other.

When should I use "Fraction" and "Ratio"?

They can all be used in everyday English.

Are "Fraction" and "Ratio" the same CEFR level?

"Fraction" is at B2, "Ratio" is at C1 on the CEFR scale.