The denominator is the bottom number of a fraction, and it tells you how many equal parts the whole has been divided into. In three quarters, the denominator 4 means the whole was split into four equal pieces.
Math Dictionary / Denominator
Denominator
The denominator is the bottom number in a fraction.
Number SystemGrade 3Grade 4Grade 5Grade 6GED
What it means
It tells how many equal parts make one whole.
Also called: bottom number of a fraction
Examples
| In 3/5, the denominator is 5 |
| In 7/8, 8 tells how many equal parts are in the whole |
| A common denominator helps add fractions |
Common mistake
Do not add denominators when adding fractions with the same denominator.
Try one
Question: What is the denominator in 4/9?
Show answer
9.