my percentile in jee mains is 77.7 am i qualified or not?

The official cutoff for the jee advance as well as for different NITs and IIITs isn't released yet, they will be available after the declaration of results. So it is difficult to say anything about the cutoffs right now but according to previous year results it is predicted that you need to score more than 80% in order to get eligible for main. However you have to wait for official cutoffs in order to be sure.
Thank you
Hope it helps

Hello,
Hopefully you can qualify but you have to wait for the results.
If you have got about 83%tile then you are surely qualified but with 77.7%tile its a bit difficult.
Hope for the best.
Best Regard

All the best for your future !!