Divide the sum of $$\dfrac{-1}{3}$$ and $$\dfrac{5}{6}$$ by the sum of the $$\dfrac{1}{-4}$$ and $$\dfrac{3}{8}$$.
Sum of $$\dfrac{-1}{3}$$ and $$\dfrac{5}{6}$$ gives $$\dfrac{-1}{3}+\dfrac{5}{6}=\dfrac{-2+5}{6}=\dfrac{3}{6}=\dfrac{1}{2}$$Sum of $$\dfrac{1}{-4}$$ and $$\dfrac{3}{8}$$ gives $$\dfrac{1}{-4}+\dfrac{3}{8}=\dfrac{-2+3}{8}=\dfrac{1}{8}$$
Dividing the sum of $$\dfrac{-1}{3}$$ and $$\dfrac{5}{6}$$ by the sum of the $$\dfrac{1}{-4}$$ and $$\dfrac{3}{8}$$ gives $$\dfrac{\dfrac{1}{2}}{\dfrac{1}{8}}=\dfrac{8}{2}=4$$