Hello

The result of JEE Main 2020 January exam has been released and the score contain the NTA percentile score. The final result of JEE Main 2020 will be formulated after the April attempt on the basis of candidates performance in January and/ or April attempt. So, it would difficult to calculate the actual JEE Main rank based on the percentile in January attempt.

However, we can predict the expected rank using the rank formula.

100 - your total percentile score is the percentage  of people ahead of you.
869010 are the number of candidates appeared for January exam.
So rank formula is (100 - your total score) X 869010 /100. If the number of candidates for April exam increased to 1200000 then your final rank shall be (100 - your total score) X 1200000/100

Based on the above formula, your probable rank would be around 82408.

It is difficult to predict the cutoff. 85+ percentile score is expected to  be a decent score to qualify for the JEE Advanced exam.

Good Luck!