jee main general..... category 78.88 %... how to improve to 200%

Hello Aspirant, If you got 78.8 percentile in JEE Main then your rank after JEE Main April will be around close to 2.5 lakhs.As being a General Candidate your percentile should be close to 95 to seat in any NIT.For that you should use this lockdown time.
First of all you should focus on your strong hold topics, so that you can maximise your score from that, don't start a new topic which you have not read till now, but you should also cover some important and east topics from which questions are asked every year and level of question is very easy.

Mathematics
Mathematical Reasoning
Height and Distance
Statistics
Area under Curve
Mathematical Induction

Physics
Unit and Dimensions
Vectors
Electronics Devices
S.H.M
Modern Physics

Chemistry
Bio molecules
Environmental Chemistry
Polymer
Chemistry in every day life
Hydrogen