How did the OA CAT percentile on Cracku predictor decrease for slot 2 ?

Even for Slot 3 it has decreased. They have created a scaled score according to the difficulty of the paper. Hopefully the real cat score does not do the same.

yes, but according to Maruti Sir's video for slot 2percentile and score will increase but not happened like that

I don't think the scaled score would go down for any of the slots. Even for Slot 1, it would increase by 1-2 marks and for Slot 2 and 3, it would increase by 3-5 marks. We have seen the scenario earlier in CAT 2019 and everyone gets a better scaled score than the raw score. Hope CAT would do the same this year as this year had the most difficult paper.