The exact cutoff percentile for qualifying JEE Mains and to be eligible to give JEE Advance is not yet announced by National Testing Agency (NTA).

Since JEE Mains is going to be conducted again in April in various shifts on various days the exact cutoff percentile cannot be estimated.

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

If you have any other queries do mention it down in the comment section.