Dear aspirant,

University of Delhi considers a candidate's best of three subjects marks for admission to Science courses and best of four subjects marks for Humanities and Commerce courses. If you wish to seek admission to any college under the university, you cannot use your overall percentage. There is also the option of taking admission in DU by giving an entrance exam but that is limited to only a few courses like BBA (FIA), BMS, BA (Hons) in Business Economics etc. In these courses, the marks that you have obtained in the entrance exam (DU JAT) will be the qualifying marks eligibility apart from the subject eligibility.
If you wish to seek admission in University of Delhi, I suggest that you calculate your best of three/four accordingly and try your chances.
To determine your chances at getting admission, I request you to check the previous years cutoff lists by using the link provided below:

DU Cut Off 2021, 2020, 2019: Arts, Commerce, Science Cutoff List PDF (careers360.com)

If you're not satisfied with this answer, I request you to visit the link provided below:

https://university.careers360.com/articles/du-admission

Hope this helps!