计算5/16÷[12/5-（5/8+1/8）÷5/4]
问题描述：
计算5/16÷[12/5-（5/8+1/8）÷5/4]
答
(5/16)/[12/5-(5/8+1/8)/(5/4)]
=(5/16)/[12/5-6/8*4/5]
=(5/16)/[12/5-3/5]
=(5/16)/9/5
=5/16*5/9
=25/144