Dear aspirant,

You can either go with your 57% or your improvement result. You can't just provide 57% in PCB now during application and join through your improved mark. You have to join with the 57% mark in PCB courses.

If you want to go with improved marks than you should apply without providing your 57 % mark and show that you are going to repeat for improvement of your percentage.

But speaking sincerely there is no difference in either of them. If you are crossing 50% mark than there's nothing to be worried about.

Hope this helps!