math

 

Get a common denominator.

\(\frac{1}{3} - 2 =\frac{1}{3} - \frac{2}{1}=\frac{1}{3} - \frac{2*3}{1*3}=\frac{1}{3} - \frac{6}{3}=\frac{1-6}{3}=\frac{-5}{3}\)