Using and displaying correct ownership percentages, with decimal points

We have actual shared percentage ownership for one property of 87.5% and 12.5%. But the percentages appear as 88% and 13% up in the collaborators window.

Two questions:
-Are my typed percentages used for calculations, or is Stessa using the (incorrect) percentages as they are appearing?
-Can Stessa use AND display the correct percentages, as entered?

Thank you.