(50-47.5)除以50x100%5%或缺巧者用方程设:这个商店是伏凳键按x税率纳税的粗橡50-50x=47.5x=?
(50-47.5)/50*100%=5%
解:设税率为x。50-50x=47.5 x=5%
50x47.5x12除2