Hello hari Priya

No there is no percentile marking scheme in jee advanced .

Percentile is adopted in jee mains to equalize all the different slots or exams .

But there is no slot in advanced every one get same exam paper so there is no percentile system. And if in future if it is adopted than it will not create any fluctuation in results because there is only one paper or slot for each students so rank will come same as you consider marks or you consider percentile.

I hope you get it.

Good luck.