What Is a Fraction?
Mathematics · Fractions, Decimals and Percentages · Grades 2–6
Meaning at a glance
A fraction is a number that names equal parts of a whole. If a bar is cut into 4 equal parts and you take 3 of them, you have 3/4 of the bar.
Also searched as: fractions, what is a fraction, part of a whole.
Understand it simply
A fraction is written with two numbers and a line between them, like 3/4. The bottom number tells you how many equal parts the whole was cut into. The top number tells you how many of those parts you are talking about.
The word equal matters. Fractions only work when every part is the same size.
Fractions can describe a part of one thing (3 slices of a pizza) or a part of a group (3 of 5 balls are red).
See it work
A chapati is cut into 4 equal pieces. You eat 1 piece. You ate 1/4 of the chapati, and 3/4 is left. Here is 3/4 shaded in blue:
Avoid this confusion
Watch out: parts that are not equal do not give a fraction. If a bar is cut into 3 pieces but one piece is much bigger, no piece is 1/3.
Also remember that a bigger bottom number means smaller pieces. 1/8 of a cake is smaller than 1/4 of the same cake.
Try it yourself
Work these out first, then check your answers below.
A pizza is cut into 8 equal slices. Amina eats 3 slices. What fraction of the pizza did she eat?
Which is bigger: 1/4 of a cake or 1/8 of the same cake?
A rectangle is cut into 3 pieces, but one piece is far bigger than the other two. Is each piece 1/3?
Check your understanding
Show the answer to question 1
Answer: 3/8
The pizza has 8 equal slices, so the bottom number is 8. She ate 3 of them, so the top number is 3.
Show the answer to question 2
Answer: 1/4
Cutting a cake into 4 equal pieces makes bigger pieces than cutting it into 8. A bigger bottom number means smaller pieces.
Show the answer to question 3
Answer: No.
A fraction needs equal parts. These parts are not equal, so none of them is exactly 1/3 of the rectangle.
Understand more with Courseversity
You now know what fraction means. Keep going with a full lesson, then explore the ideas that connect to it.
Learn
Learn this in a full lesson.
- Representing simple fractions (Grade 2)
- Fractions in everyday life (Grade 2)
- Halves (Grade 2)
- Representing non-unit fractions (Grade 3)
- Numerators and denominators (Grade 3)
- Recognising equivalent fractions (Grade 3)
Practise
Practise with Learning Lab questions for the lesson Representing simple fractions (Grade 2), with an explanation after each answer.
Explore
Ideas that connect to this word.
- Numerator: the top number: how many parts we are counting.
- Denominator: the bottom number: how many equal parts make the whole.
- Equivalent fractions: different fractions that name the same amount.
Save
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Sources and review
- Common Core State Standards: Number & Operations—Fractions – A published reference for how fraction ideas are commonly taught. Courseversity does not claim alignment with it.
Written by: Courseversity editorial team (AI-assisted draft).
Review status: checked against the sources above. Educator review is pending, so please tell us if anything looks wrong.
Last updated: 27 October 2026.