Hello. It is difficult to predict your marks from your percentile. This is because suppose you score 300 out of 360 which is the highest in your session then your percentile will be 100. And suppose another person scores 350 out of 360 in another session then his/her percentile will also be 100. So a same percentile does not mean the same marks.

But according to your current percentile your probable rank will be 323,727 - 363,727 . (Assuming you in General category). Based on this you may not be eligible for JEE ADVANCED .

But this is oviously not your final rank as it will be different if the total no. of students appearing in the April exam changes (most oviously no. of students appearing in April will be higher).

So I would recommend you to study hard and prepare well for the jee mains April session and try to score a percentile of 90+.

For study materials or how to prepare for jee mains april you can check the below link.

Https://www.entrance360.com/knockout-jee-main-april/

Hope this helps. For any query you can comment down below.

Good luck!