1-9/16
6-3 7/11
7 2/9-2 5/9

[tex]1 - \frac{9}{16} = \frac{16}{16} - \frac{9}{16} = \frac{7}{16} [/tex]

[tex]6 - 3 \frac{7}{11} = 5 \frac{11}{11} - 3 \frac{7}{11} = 2 \frac{4}{11} [/tex]

[tex]7 \frac{2}{9} - 2 \frac{5}{9} = 6 \frac{11}{9} - 2 \frac{5}{9} = 4 \frac{6}{9} = 4 \frac{2}{3} [/tex]