var result = ((float) a/ (float) b);
string str;

if (result > 0.9)
    str = "High";
else if (result > 0.5)
    str = "Medium";
else
    str = "Low";

------解决方案--------------------
C# code

int a=3;
int b=2;
if((Double.Parse(a)/Double.Parse(b)):<0.5)
{
   //低
}
else if(((Double.Parse(a)/Double.Parse(b)):>0.5&&((Double.Parse(a)/Double.Parse(b)):<0.9)
{
//中
}

------解决方案--------------------
探讨


C# code
var result = ((float) a/ (float) b);
string str;

if (result > 0.9)
    str = "High";
else if (result > 0.5)
    str = "Medium";
else
    str = "Low";