Hi, I'm scoring around 75 percent in Cracku Mocks. What could be the appro average percentile in CAT?

If it's "percentage", then you are off the charts! If its percentile, then it can vary from 85 to 95 %. If its a free mock, then the percentile will be almost similar.( 90 in free mock 1 will be 90-95 % approx.)