['First, calculate the SGPA of all the semesters.', 'Once you get SGPA of all the semesters, add them.', 'Divide the summation of the SGPAs by the number of semesters you have given.', 'Multiply your SGPA with 10 and then subtract 7.5 from the total [(SGPA * 10) – 7.5 = Percentage].']