10th/12th/B.tech = 87.4/79/78.2 General+Engg.+Male, 1.8 yrs Exp. Hw much percentile shuld i score to get IIM and othr gud MBA clgs?
You have a very decent academic record which have chances of getting a seat in a good MBA institute. You have good work experience also but it would have been better if it was 24 months i.e 2- years as it is the span of work experience which evryone considers as ideal work experience. You don't have any problem even if you have 1.8 years work experience it's quite enough to raise your bar while applying for an admission.
If you are aiming for IIM's you definitely need to have CAT percentile above 99 or atleast 98 Irrespective of your category. Even 99 isn't a promising percentile for tier-1 IIMs. Besides CAT percentile there are lots of factors involved in the selection process for IIMs. CAT score helps you to proceed to the next step in the admission process and plays a nominable role in the selection process. There are many aspirants who scored above 99 percentile and didn't receive a call for next step from any of the IIMs. Whatever it is better to score percentile above 99.
For other MBA institutions CAT percentile above 90 will be a promising score. Every institution doesn't maintain same cut-off, so if you maintain above 90 you can meet the criteria of most of the colleges. Apart from IIMs there are many good colleges for MBA.