[tex]a) \\\\\frac23=\frac{10}{15}\\\\\frac45=\frac{12}{15}\\\\\frac{10}{15} < \frac{12}{15}\\\\\frac23<\frac45\\\\b) \\\frac23=\frac{10}{15}\\\\\frac35=\frac{9}{15}\\\\\frac{10}{15} > \frac9{15}\\\\\frac23>\frac35\\\\c) \\\\\frac45=\frac{28}{35}\\\\\frac57=\frac{25}{35}\\\\\frac{28}{35} > \frac{25}{35}\\\\\frac45 > \frac57[/tex]
