Dear Humshu,

It is difficult to predict JEE Main percentile because JEE Main percentile is depending too many factors.

But according to you, if you get 198 marks then your percentile and rank would be around 99.45 - 99.53 and 4808 - 6325.

You can predict your rank and percentile from the link given below

You are belonging to the OBC category then you have an OBC quota. You can easily get admission in NIT(National Institute of Technology ) Warangal for the CSE branch because according to the previous years, the closing rank for the CSE branch in NIT Warangal was  6211. And also you can try other NITs in India.

To more information about JEE Mains  entrance exam and NIT Warangal  and NITs cutoff:-

JEE Main 2021 Exam - Answer Key (Released), Results, Paper Analysis, Question Papers (careers360.com)

NIT Warangal: Admission 2021, Courses, Fee, Cutoff, Ranking, Placements & Scholarship (careers360.com)

NITs JEE Main Cutoff 2021, 2020, 2019, 2018, 2017 - Check NIT B.Tech Admission Process, Opening and Closing Ranks (careers360.com)

Hope this information helps you...

Best of luck :)