What does fraction mean?
A fraction is a quantity representing part of a whole, most familiarly written as one number over another, such as 1/2 or 3/4. In mathematics it names a precise ratio between a numerator and denominator, allowing quantities smaller than one — and values between any two integers — to be expressed exactly. Outside the classroom, the word also carries a looser everyday sense: a fraction of something is simply a small piece or share of it, as when we say a product costs 'a fraction of the price' or an event passes in 'a fraction of a second.' This everyday usage almost always connotes smallness, making fraction a natural shorthand for scarcity or reduction. Derived from the Latin frangere, meaning 'to break,' the word carries the idea of a whole broken into parts. It remains indispensable in cooking, finance, measurement, and any field where precision below the level of whole units matters.
nounA numerical quantity that is not a whole number, expressed as one integer divided by another, such as 3/4. More broadly, a small part or fragment of something larger.
- A mathematical expression representing one or more equal parts of a whole, written as a ratio of two numbers (e.g., 3/4).
- A small part, share, or amount of something larger (e.g., 'a fraction of the price').
- A very small amount or degree; a tiny portion of time, space, or quantity (e.g., 'a fraction of a second').
"Only a fraction of the applicants made it to the final round of interviews."
"She cut the cake so that each guest received an equal fraction."
"The company's profits fell by a tiny fraction last quarter."
The plural 'fractions' refers to multiple fractional quantities, common in mathematical and educational contexts.
"Students learned to compare fractions by finding common denominators."
The word 'fraction' comes from Latin frangere, 'to break' — every time you write 1/2, you are literally breaking the number one into pieces.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fraction
Fraction derives from the Late Latin fractio, meaning 'a breaking,' which itself comes from the Latin verb frangere, 'to break.' The mathematical sense was established by mathematicians working with broken or divided units, and the word entered English in the late medieval period through Latin mathematical texts, becoming common by the early modern era. It shares this root with fracture, fragile, fragment, and refraction, all of which descend from the same Latin idea of breaking or being broken.
Related word forms
How fraction is actually used
In mathematics, 'fraction' has a precise technical meaning, but in everyday speech it usually implies a small amount — 'a fraction of the cost' almost always means far less than the whole. The verb form 'to fraction' exists in technical chemistry contexts but is rare in general use.
Easily confused with fraction
Friction is resistance between surfaces in contact, whereas fraction is a part of a whole or a division of a quantity.