In order to add or subtract fractions, we can use the following formula:
[tex]\frac{a}{b}\pm\frac{c}{d}=\frac{ad\pm bc}{bd}[/tex]So:
[tex]\frac{6}{6}-\frac{2}{3}=\frac{6\cdot3-6\cdot2}{6\cdot3}=\frac{18-12}{18}=\frac{6}{18}=\frac{1}{3}[/tex]Since:
[tex]\frac{1}{3}\equiv\frac{2}{6}[/tex]Answer:
D. 2/6
