What Is a Denominator?
Definition
Denominator: The number below the fraction bar. It tells how many equal parts the whole is split into: in 3/4 the denominator is 4. It cannot be zero.
The denominator is the number below the fraction bar. It tells how many equal parts the whole is split into: in 3/4 the denominator is 4. The denominator cannot be zero, because division by zero is undefined. A simplified fraction has a positive denominator; a minus sign moves to the numerator.
Where it appears in the formulas
The fraction simplifier uses simplified denominator = denominator / GCD and decimal = numerator / denominator. For 84/126 that is 126 / 42 = 3, and the simplified fraction is 2/3. A zero denominator returns an error.