[tex](-9.7+7.1):(-1\frac{4}{9} )= -2.6:(-\frac{13}{9} )=-\frac{26}{10} *(-\frac{9}{13} )=\frac{18}{10} =\frac{9}{5} =1\frac{4}{5} \\\\(3 \frac{1}{8} -2\frac{5}{12} )*(-1\frac{3}{17} )=(\frac{25}{8} -\frac{29}{12} )*(-\frac{20}{17} )= (\frac{75-58}{24} )*(-\frac{20}{17} )=\frac{17}{24} *(-\frac{20}{17} )=-\frac{5}{6}[/tex]