Question\text{Write the recurring decimal } 99.9\overline{9} \text{ as a fraction in its lowest terms.}

Studdy Solution
Since $100$ is already in its simplest form, the fraction representing $99.9\overline{9}$ is:
$\boxed{100}$
The recurring decimal $99.9\overline{9}$ as a fraction in its lowest terms is:
$\boxed{100}$