Hello Aspirant,
Thanks for approaching us
Actually there is no particular fixed percentage of desrease in cutoff but they descreases the cut off according to there feasibility and seat availability.
We can say that almost 10%of cut off is decreased in second merit list.
Hope this helps you
Feel free to ask any question
All the best for your future
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile