Risk Exposure Example Query

The Risk Exposure example posted on https://jazz.net/wiki/bin/view/Main/AttributeValueProviders#Examples works now in my environment.Hoewever there is small change required in the calculation. In the line where multiplication of impact and probability is returned, what we want is a decimal value like this: return impact * (probability / 100). We want to have probability value divided by 100 and then multiplied to impact value. When I do this it doesnot show the change. Probably it is not reading a decimal value. What needs to be done to implement this.