I've choosen that example with 1
BTC to keep it simple to verify!

According to this, my profit should be 0.24
BTC when i win 12% and not 0.12
BTC which looks more like a leverage of 1 and posted in the picture before!
12*0.02=0.24

1% increase when opening the position at 100$/
BTC would be much more different than 1% increase starting with 200$/
BTC at all! I'd really appreciate an explanation how this %-thing works at all.