Colleges in Delhi

Well, you score is decent and you are absolutely eligible. But you'll get admission or not depends on your caste and course you want to opt.

I'm sorry to say but the cut-off for mathematics (H) is quite high. You won't be able to get admission in Hansraj College.

No. Cut-off of Hansraj College for B.Com honors is very high. You being the science student will also undergo percentage deduction, so won't be able to get admission.

Sorry, but you won't get admission with this percentage.

Hi, you have to achieve the rank from 1 to 950 (if you are from outside Delhi) to get admission in good colleges like VIPS and JIMSVK. Rest you can search about colleges and there fees structures here at Shiksha.com (link given below).
links - https://www.shiksha.com/college/jagannath-international-management-school-vasant-kunj-Delhi-vasant-kunj-49186?rf=searchWidget&landing=ilp
https://www.shiksha.com/college/vivekananda-institute-of-professional-studies-pitampura-delhi-28593?rf=searchWidget&landing=ilp.

If we see previous year cut-offs, chances are really less for JMC, but other colleges of Delhi University like LSR might give you admission with this percentage in 2nd-3rd cut-off. To check previous year's cut-off of Delhi University, follow the link given below:
http://www.du.ac.in/cut-off.html.

It depends on which course you are applying for. But with 81.25% it is little difficult if you want to do any famous hons course from a good college of Delhi University. But still you can wait for the release of all the cut offs, you might get a good college for the course you are looking for.