Tap the blue circles to see an explanation.
$$ \begin{aligned}\frac{39}{13}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}} \frac{ 39 : \color{orangered}{ 13 } }{ 13 : \color{orangered}{ 13 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{3}{1} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3\end{aligned} $$ | |
① | Divide both the top and bottom numbers by $ \color{orangered}{ 13 } $. |
② | Remove 1 from denominator. |