I used to work full-time and now I work part-time, from the local standard 37.5 hours a week to 27 hours a week.

My boss said he'd be happy to at least have me doing something in the company than nothing at all. Doing part-time is worth asking.

I haven't noticed any loss of productivity compared to others. I just get to shuffle my time better: I can do other chores on those days or hours when I wouldn't get anything done anyway, and only work when I have the drive.