To multiply \(-116\) by \(7\):
\[ -116 \times 7 = -812 \]
Now, to write \(-812\) as a mixed number, we can express it as:
\[ -812 = -812 \frac{0}{1} \]
As a mixed number, it is simply \(-812\) because it is already an integer.
Thus, the answer is \(-812\).