Răspuns :
Este operatie de impartire deci :
[tex] \frac{28}{13} :7= \frac{28}{13} * \frac{1}{7} = \frac{4}{13} [/tex]
[tex] \frac{28}{13} :7= \frac{28}{13} * \frac{1}{7} = \frac{4}{13} [/tex]