Hello Candidate ,

For admission into B.EL.ED you don't have to worry about  your 12th percentage  as i am also a b.el.ed student and i think i can guide you the best , for taking admission into B.EL.ED in delhi university you have to give entrance exam of beled and have to score exceptionally well in that , it will be a MCQ questions based on class 5 th to class 10th so just read NCERT books for that and if you think you don't have much time for that then order a book from amazon named B.EL.ED entrance exam and whatever book shows you can order that as it will be best for preparation for the entrance exam.

Hope it helps , all the best for your future.