[tex]\LARGE\tt{}22,5 \div 70 \\ \\ \LARGE\tt{} \dfrac{45}{2} \div 70 \\ \\ \LARGE\tt{} \dfrac{45}{2} \times \dfrac{1}{70} \\ \\\LARGE\tt{} \dfrac{\cancel{45}}{2} \times \dfrac{1}{\cancel{70}} \\ \\\LARGE\tt{} \dfrac{9}{2} \times \dfrac{1}{14} \\ \\ \LARGE\tt{} \dfrac{9 \times 1}{2 \times 14} \\ \\ \LARGE\tt{} \boxed{ \dfrac{9}{28} }[/tex]

[tex]{\large\boxed{\boxed{  { \large \tt Bons~Estudos }}}}[/tex]