2.06
Step-by-step explanation:
[tex]\footnotesize\begin{aligned}\left(2a-\frac{1}{3}\right)\div\frac{b}{15}&=\left(2\left(\frac{-2}{5}\right)-\frac{1}{3}\right)\div\left(\frac{-8.25}{15}\right)\\&=\left(\frac{-4}{5}-\frac{1}{3}\right)\div \left(\frac{-825}{1,500}\right)\\&=\left(\frac{-12-5}{15}\right)\div\left(\frac{-11}{20}\right)\\&=\left(\frac{-17}{15}\right)\div\left(\frac{-11}{20}\right)\\&=\frac{17}{15}\times\frac{20}{11}\\&=\frac{340}{165}\\&=\frac{68}{33}\\&=2\frac{2}{33}\\&\approx\bf 2.06\end{aligned}[/tex]
