40/20%*60%=120
30/40=0.75=75%
60/(40%-25%)=400
4/5=140% 140%-1=40%
呵呵,好象这个是涨价啦.480/250-1=92%
(120-100)/100=20%
800*(20%+25%)+200=560 560/800=0.7=70%