To simplify \(\sqrt{\frac{3}{25}}\), you can separate the square root over the numerator and the denominator:
\[ \sqrt{\frac{3}{25}} = \frac{\sqrt{3}}{\sqrt{25}} \]
Since \(\sqrt{25} = 5\), we have:
\[ \sqrt{\frac{3}{25}} = \frac{\sqrt{3}}{5} \]
So, the simplified form is:
\[ \frac{\sqrt{3}}{5} \]