Hey!

As per the trends in cut offs observed in the past few years, the minimum required aggregate marks for admission in different courses in colleges of University of Delhi are usually above 90 percent. 

Unfortunately, it is really tough for you to get admission in DU with 80.5%. I am assuming that you are from unreserved category. If you are from SC/ST/OBC, then there are good chances for your admission surely.

I suggest you to look for admission in other central universities.

Best wishes!