To divide 11 by -4, we start with the division:
\[ \frac{11}{-4} = -\frac{11}{4} \]
Next, we convert this improper fraction into a mixed number.
- Divide 11 by 4, which gives 2 as the whole number part (since \(4 \times 2 = 8\)).
- Subtract 8 from 11 to find the remainder: \(11 - 8 = 3\).
Thus, we can express \(-\frac{11}{4}\) as a mixed number:
\[ -2 \frac{3}{4} \]
So, the final answer is:
\[ -2 \frac{3}{4} \]