I really don't know because I am not fasting to lose weight, but for spiritual reason and to heal my heart and mind of things. Losing a bit of weight is always nice, but it isn't on the front thought in my mind.
If I remember right, I weighted about 135 lbs when I started my fast and now I think I am about 113 or so. I haven't checked in a couple days. That would mean that I have lost about 22 lbs, but I know that once I start eating again, I am about to gain at least 7 lbs of that back, which is no problem with me.