MBA Entrance Exam

30.42 [percentile won't fetch you any college.

You just need to get a mere 80-82 percentile to clear the cutoff and then you have to excel best in the IRMA Aptitude Test and then convert it with your expertise. Upvote and follow if found useful.

With your CMAT score, you need to fill forms of colleges and then you need to clear GD and PI round and then you can get admission.

It is going to be very difficult for you to get an admission in IIM Bangalore, without some good Work Ex and CAT marks, as IIMB gives graduation marks very high weightage in comparison to other colleges. And, after getting in you will actually need work extra hard to justify the lower marks in graduation that you have (but, with hardwork that is possible.)
Anyway, you can also look at IIM C and L which don't give as much emphasis to past acads.
Good luck.

Since you have not mentioned your university, it is quite difficult to say. But, in general, it sure does seem possible. A lot depends on the marks of people around you (as IIM Bangalore grades your marks relative to others and then gives your application some points). Anyway, it does seem possible, just score as high as possible in your CAT.

I will be honest that IIM Bangalore is going to be very difficult for you. But, you can target IIM C, they give very low weightage to graduation marks.

Refer college rankings of reputed magazines. I got into Doon Business School, Dehradun last year with 93.5 % in CAT.

Please give the ATMA exam, aim higher, give more mocks. You will be eligible for the DTE rounds with ATMA scores and will fetch you a good college as well.

Usually, 90 above to the top 6 and the new campuses are lower.