Hello Deepak ,

For admission into NIT , it would be better if you score more than 90 percentile NITs also accept students with 80 percentile and more  , however you want to get into a good college you must get a good score as well .

You can check the given link for other details

you can go through this link for JEE MAINS VS PERCENTILE.

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Hope this was helpful , Thank you for contacting careers360.

All the best.