Hi,

To calculate CAT percentile, the CAT score is required and then the percentile is calculated depending on the number of students who gave the exam and also the scores attained by them. The XAT percentile is irrelevant in calculating cat percentile. Also the 10th, 12th and graduation marks only matter during evaluation of personal interview and also shortlisting candidates for PI and then for final admission.

I hope this helps.

All the best.