\(\dfrac{-4}{5}:\dfrac{2}{7}+\dfrac{4}{7}\\ =\dfrac{-4}{5}.\dfrac{7}{2}+\dfrac{4}{7}\\ =\dfrac{-14}{5}+\dfrac{4}{7}\\ =\dfrac{-78}{35}\)
\(\dfrac{-4}{5}:\dfrac{2}{7}+\dfrac{4}{7}=\dfrac{-14}{5}+\dfrac{4}{7}=\dfrac{-98}{35}+\dfrac{20}{35}=\dfrac{-78}{35}\)
`-4/5 : 2/7 + 4/7`
`= -4/5 xx 7/2 + 4/7`
`= -28/10 + 4/7`
`= -14/5 + 4/7`
`=-78/35`