Hello ,

I would like to tell you that the percentage and percentile are two different things.

The percentage can be calculated from the marks scored and the total marks and vice versa.

But when it comes to percentile, it depends upon the marks scored by you, the total number of students appearing for the exam, the number of students who scored less/more than you.

So as you see it's not possible to predict the numbers.

So it is not possible to calculate the marks from percentile.

Hope this helps and all the best!