【1/3+8/33*﹝5/6-0.375﹞】除以2/3
=【1/3+8/33*﹝5/6- 3/8﹞】× 3/2
=【1/3+8/33*﹝11/24﹞】× 3/2
=【1/3+1/9﹞】× 3/2
=4/9 × 3/2
=2/3