1/4*8/9÷(3/4-5/12) 1-5/6÷15/16*3/16 = 1/4*8/9÷(9/12-5/12) -5/6*16/15*3/16 =1/4*8/9÷4/12 -5/6*16/15*3/16 =1/4*8/9*3-5/6*16/15*3/16 =2/3-1/6 =3/6=1/2
