3. Сократите дробь до несократимой дроби: а) $$rac{14}{63}$$; б) $$rac{32}{80}$$; в) $$rac{72}{108}$$

а) $$rac{14}{63} = rac{2 cdot 7}{9 cdot 7} = rac{2}{9}$$

б) $$rac{32}{80} = rac{2 cdot 16}{5 cdot 16} = rac{2}{5}$$

в) $$rac{72}{108} = rac{2 cdot 36}{3 cdot 36} = rac{2}{3}$$