The CAT percentile required to get into IIMA and IIMC depends on certain factors like:
Prior work experience: Considering your profile, a work experience of 2 or fewer years will require a minimum of 99.3 percentile.
Gender: If you are a male of the general category you will require at least 99.5+ without work experience and 99.7+ with work experience.
Category: Categories other than general can receive calls even with a percentile of 99.
Stream: Non-engineers also tend to receive calls with a percentile of 99.
An important point to note here is that if you get into IIM Ahmedabad with this profile, you will have to work harder than other students to secure an internship or get placed. Most core companies want candidates only with top scores and IIM Ahmedabad happens to have a lot of such students.