Denominator

The denominator is the bottom number of a fraction .

$\begin{array}{ccc}\boxed{3}& \to & \text{numerator}\\ \bar{\boxed{7}}& \to & \text{denominator}\end{array}$

Since fractions are just shorthand for division, the denominator is the number by which the numerator gets divided. In a division problem, it is called the divisor .