Yes, sorry, that was confusing. I meant that I use 85% of the rooms in my house for the time that I am open. My "claim" percentage was around 20% for home expense things.

We only have 3 bedrooms and they are all used for naps in the afternoon, to try and minimize the noise they have to endure. The one family room we only really use if we're watching movies (which is really only if someone is sick) or occasionally the kids will play up there at the end of the day because they think its fun to watch their parents drive up. The ensuite bathroom is the only room that is never used for daycare.