Calculating rental vs personal use of home

I rent out part of my home.  I use 1 room, and I rent out 3 rooms plus a basement apartment with a shared entrance (hallway).  Rooms 1-4 share the upstairs living area.

My room (Room 1) is 110 sf

Room 2 is 110 sf

Room 3 is 110 sf

Room 4 is 244 sf

basement room is 672

Shared living space for 4 upstairs bedrooms is 1132 sf

Total: 2368

What percentage is personal vs rental?  I've heard different advice of how to calculate the percentage.