Ramadan weight losses

So im fasting for Ramadan and I'm getting pretty disheartened looking at the number on the weighing scale plummeting further down with each day ... For reference im 186cm (6'1") and was 77kg (170lbs) before I started - I am now 73kg (161lbs), and its only been 8/30days!

Does anyone know if this is normal, how much I could lose in total potentially or if i stand to lose even more?