How much weight can I expect to loose during a fast?

Aw

I’m 5ft 2in, I weigh 64.1kg so I’m at that awkward overweight size and I’m desperate to get down to 50kg. I’m starting a 100 hour fast on Monday, I’ve fasted before and I know I can do it. How many kg do you reckon I’ll loose during those 100 hours?

I’ve lost around 3kg in 2 weeks, I’ve fasted once (80hours) and I’ve heavily restricted my diet. Today for example I barely reached 400cals. Average 500-600cals per day, but as high as 1000 and as low as 0. I just don’t feel like I’m loosing as quick as I’d like.

Also I know that this isn’t a healthy way to loose weight and it messes up your metabolism but I know what I’m doing and how to reintroduce food without just gaining it all back on after a fast. I weighed myself on the 7th and I just got a new set of scales since I dropped and broke my old set. I was 66.9kg on the 7th, today I weighed in at 64.1kg so since I didn’t have a working scale during the 80hr fast I don’t know how much I lost during that time.