[tex]\frac{3}{7} *\frac{5}{6}=\frac{1}{7}*\frac{5}{2} =\frac{5}{14}[/tex]
[tex]\frac{4}{5}:\frac{2}{3} =\frac{4}{5}*\frac{3}{2} =\frac{2}{5}*3=1,2[/tex]
[tex]\frac{2}{3}*\frac{5}{6}=\frac{1}{3} *\frac{5}{3} =\frac{5}{9}[/tex]
