How would I calculate a ratio based on specific criteria?

Hey Chris - are you referring to the Length value? Such as .25 (equaling 15 minutes)?

Yes. 1:4 should be just as legitimate a representation of the ratio as .25:1.

I guess I am not fully tracking with your suggestions.  So if it takes 49 hours to create 1 hour of content (49:1) it would take 24.5 hours to create a 30 minute session. Which would be easy to build into the formula if that was the only two options - so I am looking to find a solution that would calculate based on length - which is in 15 minute increments.  So for example: a 30 minute course would be entered as .5 and a 15 minute course would be .25, etc.  Problem is, a course could be 7.5 hours, or 58.25 hours, and I need to be able to calculate that design time based on the Level ratio (49:1 or 79:1 etc).  Does that make sense?