Greetings!
In Delhi University, if you change your stream from science to arts, then you may have to face a deduction of 2% to 2.5% in your Best four percentage.
When you are thinking of getting an admission in Delhi University, then please keep in mind that it's cut off is not an easy task to clear. And if you are going to opt for a stream that you have not studied in 12th standard, then there are chances that after the deduction, you may not be able to make up to the cut off.
But on the contrary, if you think that your cut off s enough after deducting a specified percentage, then it is not a matter of concern.
Decide about this thing wisely, good luck.

Hi! The if you are changing your stream from one to other in UG then your percentage will be deducted in some colleges. There are different criterion of different colleges for that. Some Colleges deduct 5%, some 2.5%, some 2%, some none. So it totally depend on the college you want to apply. The cutoff for different streams also varies every year. Even the cut off for subject wise hons. also varies.

Hey aspirant,
Yes it does not matter from which stream you are, cutoff will be same for UG admission.
I hope this will help you out, for further query you can comment below.

All the best.