1. If you've given more than 1 semester, then calculate the SGPI of all of them.
2. Add the SGPI of all the semesters that you've given till now for the academic year.
3. Divide the summation of the SGPAs by the number of semesters you have given.
4. Multiply your SGPI with 10 and then subtract 7.5 from the total [( SGPI * 10) – 7.5 = Percentage

Meaning if 7.60 is your overall SGPI then your percentage will be 7.60 into 100 - 7.5

= 76.60 - 7.5

=69.10%

Best wishes. Thank you.