Hi IIT aspirant , As the qualifying percentile for Jee mains this year is 50percentile so your percentile is more than that of 50percentile so you can definetly write Jee Advanced exam , as your score is not up to the mark in jee mains so try to score better marks in the jee advanced and get a good score in it and get a good IIT seat so that you can study in the best colleges , hope that you will definetly get your desired seat and all the best for your coming exams