minimum percentage required in class 12th is different for different categories
for unreserved candidate 60%
for reserved candidate 50%
the addmission process is offered by on the basis of wbjee score followed by counselling.
If you want to know more information about the jadavpur university kolkata then you can go through the below link
Jadavpur University,kolkata is a very good university, you need atleast 50% Percentage in your 12th to get admission in this university.cutoff for this university is very so you need to study really hard and have to secure a good rank.
I hope it helps
Best of luck