Hello aspirant,

With the above mentioned Percentile in JEE mains, you will be eligible for JOSAA Counselling irrespective of the rank you belong. But you may have difficulty in getting eligible for taking admission in good NIT's as the basic eligibility criteria for NIT is that student must secure 60% or 70% in their class 12th and at least 50% in PCM aggregate.

Further, to know more about the JOSAA Counselling and other details about the JEE mains, you can follow the below mentioned link to know more : https://engineering.careers360.com/articles/josaa

I hope that this will help.