Hello dear student,

As you said you have obtained 53 percentile in JEE mains and also you are a general category student. although it is very difficult to predict the exact rank on the basis of your percentile but as your percentile is 53  and which is quite low. So it will be difficult for you to get a chance to give JEE advanced. While you can expect your rank to be in between 350,000 to 410,000 .

If you want to calculate your rank by your own then dear student you can do it as 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.

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

I hope this was helpful

Best wishes