Hi there,
Your percentile can't be actually calculated without having complete data since it depends on the number of students appeared as well, but the rank can be predicted by using the previous year details.
According to 2018 marks vs ranks, you can expect a rank of around 6000-7000, which is really good.
By using previous years data we can tell that you can have a percentile of around 99.33-99.43, which can land you in a good branch and college.

ALL THE BEST FOR FUTURE.
Thank You.