Based on your past academic records and considering you have no work experience and belong to OBC category, the required percentiles for you are:

IIM A - 97+

IIM B - 96+

IIM C - 96+

All the best!

You get a shortlist from top IIMs are depends on more than just your CAT score.The elements that play a crucial part in the shortlisting process are X Marks, XII Marks, Graduation Marks, Work Experience, Education Diversity.

According your academic score you can have the chances but also you should have a good extra curriculum profile and good record and good CAT score or performance. You will require above 99 percentile in CAT entrance exam to get admission in Top IIMS.

Good Luck!