| $$ \begin{aligned}\frac{244140625}{10^{11}}& \xlongequal{ }\frac{244140625}{100000000000} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}} \frac{ 244140625 : \color{orangered}{ 48828125 } }{ 100000000000 : \color{orangered}{ 48828125 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{5}{2048}\end{aligned} $$ | |
| ① | Divide both the top and bottom numbers by $ \color{orangered}{ 48828125 } $. |