(5/6-1/3)÷2/3=(5/6-2/6)÷2/3=3/6÷2/3=1/2×3/2=3/4
(5/6-1/3)/(2/3)=(5/6-2/6)/(2/3)=(3/6)/(2/3)=(3/6)*(3/2)=3/4