hello aspirant,,

first congrats for your good score in jee mains paper 2 examination.

if you belong to obc category or other social reservation status your mark is good enough to get an admission for barch course in nits. of course you can apply for the aat exam if you have qualified for the jee paper 1 examination also for the admission in iits.

Since the percentile is calculated from a scale ranging from 100 to 0 for each session of examinees, the formula applies the total number of students in the that session multiplied by the percentage of people who are ahead of you to arrive at the rank. it means you cannot actually assume your percentile just from the score you obtained, infact if you can know how many student are ahead of you, then you can by the way which is not possible.

you can wait for the percentile to be declared for your good hopes of admission...

hope this information helps...

all the best for your bright future