Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{252+108+360}{630}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{720}{630} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}} \frac{ 720 : \color{orangered}{ 90 } }{ 630 : \color{orangered}{ 90 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{8}{7}\end{aligned} $$ | |
| ① | Simplify numerator and denominator |
| ② | Divide both the top and bottom numbers by $ \color{orangered}{ 90 } $. |