[tex]2\frac{5}{7} +1\frac{3}{5} =2\frac{25}{35} +1\frac{21}{35} =3\frac{46}{35} =4\frac{11}{35} \\\\7\frac{7}{9} -5\frac{1}{5} =7\frac{35}{45} -5\frac{9}{45} =2\frac{26}{45} \\\\5\frac{3}{8} -2\frac{4}{7} =5\frac{21}{56} -2\frac{28}{56} =2\frac{49}{56}[/tex]
