Hello supreeth
Welcome to careers360
According to your percentile you rank is around 270k-290k
As per now career360 is assuming the cut off as 85 percentile,so you may not get a seat in nits . 
Don't worry still you have a chance .
Stay focused and work persistently. Take breaks in-between and have a self assessment about the subjects that you are reading. Which one to practice more and etc. Make small notes and keep it handy. Take as many tests as possible. It will help you identify your weaknesses. Don't forget to enjoy your life as well . EAT,PRAY,STUDY repeat. 
Good luck!