〔7/12×11-11×3/8〕÷33/12
=〔7/12-3/8〕×11×12/33
=〔7/12-3/8〕×12/3
=〔7/12-3/8〕×4
=7/12×4-3/8×4
=7/3-3/2
=14/6-5/6
=5/6