Hello Prathap. Welcome to Careers360. Since the JEE Mains exam is taking place twice this year. So it would be difficult to predict the final rank. The marks needed to qualify for the JEE Advanced will be out after the second exam only which will take place in April. 

However to give you an estimate, according to previous year cutoffs. Minimum 85 percentile was required to be eligible for JEE Advanced. Hope this answer helps you. 

National Testing Agency (NTA) has not yet announced the precise cutoff percentile for qualifying JEE Mains Examination. Since JEE is again going to be conducted in April the cutoff cannot be predicted. 

I suggest you to wait for the officials to announce the cutoff percentile. 

If you still have any queries feel free to ask in the comment section down below.