10 4/7×(-2 11/12)
8 1/6×(-7 1/5)
7 5/9×(-9 3/4)

[tex]10 \frac{4}{7} *(-2 \frac{11}{12} )= \frac{74}{7}*( -\frac{35}{12} ) = (-30\frac{5}{6} )[/tex]

[tex]8 \frac{1}{6}*(-7 \frac{1}{5} ) = \frac{49}{6}*(- \frac{36}{5} )= (-58\frac{4}{5})=(-58,8)[/tex]

[tex]7 \frac{5}{9} *(-9 \frac{3}{4} )= \frac{68}{9}*(- \frac{39}{4} )=(-73 \frac{2}{3} )[/tex]