Previously, you needed to multiply your CGPA by 10 and subtract 5 from the result to get your percentage according to the norms of Gauhati University. Let’s say you got a CGPA of 8.5. Then your percentage will be 8.5*10=85-5=80%. 

Recently, the university has changed the calculation procedure. As per the updated process, the extra 5 is not subtracted while calculating the percentage.