| $$ \begin{aligned}\frac{288}{256}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}} \frac{ 288 : \color{orangered}{ 32 } }{ 256 : \color{orangered}{ 32 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{9}{8}\end{aligned} $$ | |
| ① | Divide both the top and bottom numbers by $ \color{orangered}{ 32 } $. |