[tex]6\frac{7}{9} -\frac{1}{3} =6\frac{7}{9} -\frac{3}{9} =\large\boxed{6\frac{4}{9} }[/tex]
[tex]5\frac{1}{4} -\frac{5}{8} =5\frac{2}{8} -\frac{5}{8} =4\frac{10}{8} -\frac{5}{8} =\large\boxed{4\frac{5}{8} }[/tex]
[tex]1\frac{1}{2} -\frac{5}{9} =1\frac{9}{18} -\frac{10}{18} =\frac{27}{18} -\frac{10}{18} =\large\boxed{\frac{17}{18} }[/tex]
[tex]7\frac{3}{4} -5\frac{7}{9} =7\frac{27}{36} -5\frac{28}{36} =6\frac{63}{36} -5\frac{28}{36} =\large\boxed{1\frac{35}{36} }[/tex]
