Answer
$\dfrac{2\sqrt[]{21}}{7}$
Work Step by Step
Rationalizing the denominator of $
\dfrac{2\sqrt{3}}{\sqrt[]{7}}
$ results to
\begin{array}{l}
\dfrac{2\sqrt{3}}{\sqrt[]{7}}
\cdot
\dfrac{\sqrt[]{7}}{\sqrt[]{7}}
\\\\=
\dfrac{2\sqrt[]{21}}{\sqrt[]{49}}
\\\\=
\dfrac{2\sqrt[]{21}}{7}
.\end{array}