Сократи дроби. Ответы запиши в виде несократимых дробей

а) \(\dfrac{8}{12} =\) [ ],

\(\dfrac{21}{28} =\) [ ],

\(\dfrac{12}{15} =\) [ ],

\(\dfrac{6}{15} =\) [ ];

б) \(\dfrac{4}{8} =\) [ ],

\(\dfrac{15}{30} =\) [ ],

\(\dfrac{6}{24} =\) [ ],

\(\dfrac{3}{15} =\) [ ];

в) \(\dfrac{36}{24} =\) [ ],

\(\dfrac{60}{48} =\) [ ],

\(\dfrac{30}{24} =\) [ ],

\(\dfrac{45}{18} =\) [ ].