The number -4 can be represented as a rational number in several ways. One common representation is as a fraction. For example, -4 can be written as:
\(-4 = \frac{-4}{1}\)
Additionally, it can also be represented as:
\(-4 = \frac{-8}{2}\) or \(-4 = \frac{-12}{3}\)
These all represent the same rational number in different forms.