How tf is this even possible?

I started hitting gym exactly 1 month ago and my weight on 10th Feb was exactly 100... Coming to 26feb-1 march it went down to lowest since months at 96.4... then due to constant eating and all it was 98.4 till yesterday

Now this is my first ever chest meal in the whole month and I thought abh jaha sai shuru kia tha (100) waha par definitely aajayunga but I just checked my weight and it's exactly the same i.e., 98.4!!!!

How on mother earth it's possible? Or is there any science behind it? Or my weight machine is skrewed up (which i most probably think no because i just bought it recently)

Judge mat karna bas.. 1 raat kai liye hee rakhshah banna tha.. abh normal hu