Generally admission process in different B Schools is based on different percentiles in CAT Exam and the percentile that B-School is accepting. for  instance to get a call from IIM you need to score approximately 95-99 percentile for its PGPM course.

For further details you can take help from the below mentioned link:-

https://bschool.careers360.com/articles/cleared-cat-cut-offs-for-various-b-schools

Good Luck

•  As per the basic eligibility criteria of CAT ,the management aspirants must have a Bachelor’s Degree with minimum 50 percent marks in aggregate.
•  The final year undergraduate (UG) students are also eligible to apply for the exam. 
• There is a relaxation of 5 percent in graduation marks for SC, ST and PwD candidates.