Express the following as a recurring decimal:

$\dfrac{20}{3}$

By actual division, we get:

$\begin{array}{r} 6.666… \ 3 \overline{\smash{)} 20.000 } \ \underline{18} \phantom{.000} \ 20 \phantom{.00} \ \underline{18} \phantom{.00} \ 20 \phantom{.0} \ \underline{18} \phantom{.0} \ 2 \phantom{.} \end{array}$

∴ $\dfrac{20}{3} = 6.666… = 6.\overline{6}$