Numbers is automatically formatting my cells

Whats happening is that I have a cell that is a currency and I am dividing it by a number to get a percentage. It's giving me the percentage as currency but won't let me format it back to percentage. I've switched it to auto and off and back again and then number then percentage and it would change it back to currency then I would change it to number. It was all fine and dandy yesterday I don't know if I edited something wrong or if the update has something to due with this, but I'm getting pretty annoyed with it.

Any help would/will be appreciated 🙂