Hello

It would be difficult to calculate the exact rank. However, expected rank can be calculated using the formula mentioned below:

100 - your total percentile score is the percentage  of people ahead of you.

869010 are the number of candidates appeared for Jan exam.
So rank formula is (100 - your total score) X 869010 /100.

As per the formula, your expected rank would be around 593186.

It should be noted that if the number of candidates for April exam increased to 1200000 then your final rank shall be (100 - your total score) X 1200000/100

As per your percentile, chances are less to get admission in colleges through JoSAA Counselling. You should appear for the April exam and aim to score better and improve your performance in the next attempt.

Good Luck!