Respuesta :

[tex]\frac{13}{15}=\frac{65}{75}\\\\\frac{21}{25}=\frac{63}{75}\\\\\frac{65}{75}\ \textgreater \ \frac{63}{75}[/tex]

[tex]\frac{13}{15}[/tex] is bigger than [tex]\frac{21}{25}[/tex].