Сократи дроби аналогично примеру

а) \(\cfrac{12}{63}=\cfrac{4\cdot \overset{\tiny 1}{\cancel{3}}}{\underset{\tiny 3}{\cancel{9}}\cdot 7}=\cfrac{4\cdot 1}{3\cdot 7}=\cfrac{4}{21}\) ;

б) \(\cfrac{\overset{\tiny 1}{ {4}\mathllap{/\,} } \cdot \overset{\tiny 1}{ {5}\mathllap{/\,} }}{\underset{\tiny 5}{ {25}\mathllap{/\,} } \cdot \underset{\tiny 3}{ {12}\mathllap{/\,} }}=\cfrac{1\cdot 1}{5\cdot 3}=\) [ ];

в) \(\cfrac{12\cdot 10}{25 \cdot 7}=\) [ ] \(=\) [ ];

г) \(\cfrac{14\cdot 3}{5\cdot 28}=\) [ ] \(=\) [ ];

д) \(\cfrac{14\cdot 10}{15\cdot 21}=\) [ ] \(=\) [ ];

е) \(\cfrac{16\cdot 51}{17\cdot 64}=\) [ ] \(=\) [ ].