Not really because it is completely dependent on what is part of each unit and they differ by resort and even within resort.
For example, at BPK…they declared the 202 resort studios in two units…101 in each, Unit 11 and Unit 12.
So, the % of ownership would be based on that. There is no standard way. But, you’d have to try to find each of the filled document for the declarations on the comptroller site, assuming you are talking WDW.
Once you find what you are looking for you can go from there.