I have above 90% in tenth and 12th, but in BTech I have 67%. I have 2 years of work experience. I belong to OC. Can I get a seat in IIM Bangalore? If possible, on what percentile?

Your chances of getting a call from IIM Bangalore are only if you belong to the top 10 CAT toppers with a 100% percentile.

Selection criteria are irrespective of anything including the work experience you mentioned in your question. The only chance you might get a call is if some of the toppers have a very bad academic record. In this way, the next candidates in line might get the golden opportunity, which is rare.

To be honest, your graduation score might make it quite difficult to get a call from IIM B, but you can expect a miracle if you have scored a 100 percentile or a minimum of 99.5 + percentile in CAT. Only after getting such exceptional scores, your 2 years of work experience might give an advantage as IIM Bangalore gives preference to the experienced candidates along with the percentile mentioned.