Répondre :
[tex] \frac{14}{15} * \frac{9}{7} [/tex]
= [tex] \frac{7*2*3*3}{5*3*7}[/tex]
= [tex] \frac{2*3}{5}[/tex]
= [tex] \frac{6}{5}[/tex]
= [tex] \frac{7*2*3*3}{5*3*7}[/tex]
= [tex] \frac{2*3}{5}[/tex]
= [tex] \frac{6}{5}[/tex]