With the percentile provided , i find it hard to predict your chances of admission. Since your  chances of admission depend upon many other factors like your category , your preferred course ,your rank etc which you have not mentioned .You can check the previous years BCECE cutoff by following the given link:

https://www.google.com/amp/s/engineering.careers360.com/articles/bihar-ugeac-cutoff/amp

You can also predict the colleges you can get on the basis of your marks by using JEE MAINS PREDICTOR TOOL.