To subtract the fractions \( \frac{3}{5} \) and \( \frac{1}{5} \), you can simply subtract the numerators since the denominators are the same:
\[ \frac{3}{5} - \frac{1}{5} = \frac{3 - 1}{5} = \frac{2}{5} \]
So, \( \frac{3}{5} - \frac{1}{5} = \frac{2}{5} \).