分数计算(5/6-0.75)÷(2/3-0.4)=(5/6-3/4)÷(2/3-2/5)=(10/12-9/12)÷(10/15-6/15)=1/12÷4/15=5/16
(5/6-0.75)÷(2/3-0.4)=(5/6-3/4)÷(2/3-2/5)=(10/12-9/12)÷(10/15-6/15)=1/12÷4/15=5/16希望采纳,谢谢