Hello,
You can not calculate your marks using percentile but you definitely can calculate your jee mains rank.Based on your percentile, your predicted rank is above 83000.You can follow the below given link for more information:
https://engineering.careers360.com/articles/how-calculate-jee-main-2019-rank-based-on-nta-percentile-score/amp
Good luck.

Hello.

Your percentile score is released relative to the performance of all the candidates who have written the examination. So, it's quite difficult to give your exact score based on your percentile score. However, your rank can be predicted using the formula:

JEE Main 2019 rank (probable) = (100- NTA percentile score ) X 874469 /100

Hope this helps.