\(39\dfrac{1}{3}:\dfrac{4}{5}-19\dfrac{1}{3}:\dfrac{4}{5}\)
\(=\dfrac{118}{3}:\dfrac{4}{5}-\dfrac{58}{3}:\dfrac{4}{5}\)
\(=\left(\dfrac{118}{3}-\dfrac{58}{3}\right):\dfrac{4}{5}\)
\(=20:\dfrac{4}{5}\)
\(=25\)
39\(\dfrac{1}{3}\):\(\dfrac{4}{5}\)-19\(\dfrac{1}{3}\):\(\dfrac{4}{5}\)
=\(\dfrac{118}{3}\):\(\dfrac{4}{5}\)-\(\dfrac{58}{3}\):\(\dfrac{4}{5}\)
=\(\dfrac{295}{6}\)-\(\dfrac{145}{6}\)
=\(\dfrac{89}{6}\)