3/10:0.2=0.3:0.2=3:2=1.5化简比 3:2 比值为1.5
3/10:2/10=3/10*10/2=3/2=3:23/2=1.5
10分之3:0.2化简比并求比值; (3/10):0.2 =0.3:0.2 =3:2 3/2 =1.5