Hello Aspirant,

For appearing in JEE-Main there is no compulsion for percentage but if you are seeking admission in NITs/IIITs/CFTIs through JEE-Main 2021 score or wat to sit for JEE-Advance 2021 then you should have passed in all the subjects of your class 12th. And the 75% criteria has been waived off for this year due to the pandemic but from next academic year it might get restored, so for safe side you should try to secure 75% or more in your class 12th.

For more info :-

https://learn.careers360.com/engineering/jee-main/

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!!