it is simple for eg
Step 1: Add the grade points = 9+7+9+8+9 = 42
Step 2: Divide the sum by 5
42/5 = 8.4
Thus, your CGPA is 8.4
To convert the CGPA to Percentage, multiply it with 9.5.
In this case, if CGPA is 8.4 then the percentile is 8.4 * 9.5 = 79.80%