Hey there

By using the formula 100-87.22*869010/100 so as 87.22 is your percentile and 869010 is the no of Candidates who appeared for JEE Mains session. Going by that, your All India Rank would be approximately 111059. Since amrita university has started to take admissions through jee mains you less chance to join the college as amrita university has its own exam and for banglore campus from same state is around 10k and for other it's 6k so even though from jee mains you need to score around 50k for CSE.

good luck