This depends on the college you are applying for, some college give admission on the basis of your class 12th marks and some on the basis of entrance exam they organise so if you are applying for the colleges which gives admission on the basis of class 12th marks then there are good chances that you get a seat in them but remember that there are some colleges which look for very high percentage but as you have 87% so there are quite good chances that you get decent college.