6/5*7/8-6/5*62.5%
=6/5*（7/8-5/8)
=6/5×1/4
=3/10
=(4*25%)*(8*1.25）
=1*10
=10
=17/36×12+19/24×12
=17/3+19/2
=(34+57)/6
=91/6