hello,

It would be difficult to tell you the exact qualifying percentile but according to the previous cut off you should have 74.3166557 percentile as OBC NCL category to write JEE advanced. You can also check your best admission possibilities as per your percentile with JEE Main College predictor tool, the link for which is given below https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope that helps you.

Thank you.