Thanks for your reply about Assessments - I've had a close look but I'm still having a problem displaying a percentage.
I've tried using the following in the Assessment rule at Scope = Total Level
Total score: {TOTAL}
<This provides a simple sum of all the scores in the Assessment field which is fine, but what I'd like to do is provide the user with a percentage as below [this is pseudocode as I can't find out how to create a percentage score]>
Percentage: ( {TOTAL} / NumberOfQuestions) * 100
I've also used the {PERC} assuming that would return a percentage but again that just returns the sum of all the Assessment values.