0.2写成分数是一百分之二十也就是五芹仿分之嫌喊纤一0.3是十分之三0.4是五分之二0.5是二分之一 0.6是五分之三0.7是十分之七0.8是五分之四渗袭0.9是十分之九
1/掘芹滑知10 = 0.1 ; 15/判让毕100 = 0.15 ; 2/10 = 0.2 3/10 = 0.34/10 = 0.445/100 = 0.455/10 = 0.56/10 = 0.67/10 = 0.78/10 = 0.89/10 = 0.995/100 = 0.9510/10=1