[tex]\bf \cfrac{88}{252}~~ \begin{cases} 88=2\cdot 2\cdot 2\cdot 11\\[0.8em] 252=2\cdot 2\cdot 3\cdot 3\cdot 7 \end{cases}\implies \cfrac{\underline{2\cdot 2}\cdot 2\cdot 11}{\underline{2\cdot 2}\cdot 3\cdot 3\cdot 7}\implies \cfrac{2\cdot 11}{3\cdot 3\cdot 7}\implies \cfrac{22}{63}[/tex]
