Using this http://www.matrixeducation.com.au/atar/atar-calculator.htmlRaw mark is alligned, then scalled.
I was messing around with the drama scalling, and almost half of all drama students get in the 80-90% range. That is such tough competition to get a higher mark.Your raw mark in the final HSC exam is first aligned by the BOS. Then, when the UAC is calculating your ATAR they will apply scaling.