To determine if \( d = 11 \) is a solution to the equation
\[ \frac{9}{d} = 99, \]
we can substitute \( d = 11 \) into the equation:
\[ \frac{9}{11} = 99. \]
Calculating \( \frac{9}{11} \):
\[ \frac{9}{11} \approx 0.8181, \]
which is not equal to 99.
Therefore, the answer is no, \( d = 11 \) is not a solution to the equation.