[tex]6 - 3 \frac{2}{7 } [/tex]

[tex]6 - 3\frac{2}{7} = 6 - \frac{7 x 3 +2}{7} = 6- \frac{23}{7} = \frac{7 x 6 - 23}{7} = \frac{42-23}{7} = \frac{19}{7} =2 \frac{5}{7} [/tex]