. Oh wow, I thought the percentage of use of home was what percent of your home is used for daycare space. So, in my case, my first child arrives as early as 6:45 and the last pick up is as late as 6:15...that percentage should be 50% (12 hours of the day) as opposed of the 30% I was using before (area of home used). But actually, if I factor in weekends and holidays...confusing ?!