Answer
$$\frac{4}{10}=\frac{2}{5}$$
Explanation
| $$ \begin{aligned}\frac{4}{10}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}} \frac{ 4 : \color{orangered}{ 2 } }{ 10 : \color{orangered}{ 2 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{2}{5}\end{aligned} $$ | |
| ① | Divide both the top and bottom numbers by $ \color{orangered}{ 2 } $. |
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