Respuesta:
15/28
Explicación paso a paso:
[tex]\frac{9}{12}\div \frac{7}{5}\\\\\frac{9}{12}\times \frac{5}{7}\\\\\frac{3}{4}\times \frac{5}{7}\\\\\frac{3\times \:5}{4\times \:7}\\\\\frac{15}{4\times \:7}\\\\\frac{15}{28}[/tex]
