As you said your graduation percentage is 55 % , you are eligible to give CAT entrance exam . First don't think of admission in MBA , get good marks in CAT entrance exam from 95 percentile to 99 percentile . Most IIM'S have cut offs in that range , the admission for MBA is done on a point system basis , your 10th std , 12th std and graduation marks with your CAT  exam score with written ability test and personal interview and work experience (if any). Most of the top MBA college follow this criteria . So, i suppose you will do well in these exams and test , the following colleges you can get : 

1) NMIMS UNIVERSITY (HAS SEPERATE ENTRANCE EXAM CALLED NMAT )

2) SYMBOISIS UNIVERSITY (  (HAS SEPERATE ENTRANCE EXAM CALLED SNAP )

3) IIM'S 

4) MANIPAL UNIVERSITY 

5) AMITY UNIVERSITY 

6) FORE SCHOOL OF MANAGEMENT

7) BIM TRICHY

8) IPE HYDERABAD 

9)GOA INSITUTE OF MANAGEMENT 

10) IMRA ANAND 

11) SP JAIN MUMBAI

12)KIIT SCHOOL OF MANAGEMENT 

13) ISBM PUNE

14) JAIPURA INSTITUTE OF MANAGEMENT 

15) IBS HYDERABAD 

These are the colleges i assumed you can get if you have good entrance exam score , you graduation marks will get covered up if you do well in entrance exams ,written ability test and personal interview . 

Hello,
Let me bring this to your notice that for admission in mba cat ( common admission test ) is conducted through out the nation. Most of the good colleges rely on cat score to provide admission to mba
For appearing in cat one must have 50 % marks or equivalent cgpa in graduation. By this fact you are completely eligible to prepare and appear for cat entrance exam. Its one of the most competitive exams in india.
It offers admission in top iims (indian institute of management ) for mba. There are several other good colleges which accept cat score.
You can browse the link given below to look out for some.http://www.bschool.careers360.com/colleges/ranking
So as of now i would suggest you to start preparing for cat .The exam is conducted in the month of november . Prepare well and score well. If needed then join a coaching institute as well.
Good luck