I am creating a form that has twelve sections. At the end of each section there is a score based on questions in that section. At the end of the entire form there is a total score based on the scores of all the other questions. Is there a way to c

Well, I'm assuming the maximum possible score is a fixed number, right? Let's say it's 24 and the field that contains the actual score is called TotalScore. So all you need to do is use the following as the Simple Field Notation calculation of the percentage field:

TotalScore / 24