17.5:5 =3.5
98:7 =14
0.25:3.25 =10/13
15分之8:0.48=1又1/9
1:7分之2=3.5
8分之3:0.65 =15/26
4.2:30%=14
135%:5分之3 =2.25
125%:25% =5