Hi student,

Your percentile is 15.3920450 only. The score released by NTA is itself the percentile score. This means 15.3920450% students of the total students appeared for the Exam are Behind you. Therefore Your calculated Approximate rank is 739870. However this is not your final rank. Whether you have qualified jee mains and are  eligible for jee advance or not will depend upon whether you have crossed the cutoff marks declared by NTA officially. This cutoff will be different for different categories of students. As of now, the cutoff have not been declared and reportedly will be declared after the jee mains exam in April.

However your score is low according to previous year statistics and so you should try to improve your score next time to get a good Engineering college.

Good luck