8/9÷[(1/2+1/6)÷3/4] 1÷[(7/12-50%)×3] (1/2-1/3)×3/8÷25%

8/9÷[(1/2+1/6)÷3/4] 1÷[(7/12-50%)×3] (1/2-1/3)×3/8÷25%
8/9÷[(1/2+1/6)÷3/4] 1÷[(7/12-50%)×3] (1/2-1/3)×3/8÷25%

8/9÷[(1/2+1/6)÷3/4] 1÷[(7/12-50%)×3] (1/2-1/3)×3/8÷25%
8/9÷[(1/2+1/6)÷3/4]
=8/9÷(2/3x4/3)
=8/9x9/8
=1
1÷[(7/12-50%)×3]
=1÷（1/12x3）
=1x4
=4
(1/2-1/3)×3/8÷25%
=1/6x3/8x4
=1/4