To find the grade percentage, you divide the obtained marks by the total marks and then multiply by 100.
In this case, you obtained 22 marks out of a possible 30. The formula for calculating the percentage is:
Percentage = (Obtained Marks / Total Marks) × 100
Plugging in the values:
Percentage = (22 / 30) × 100
Now, performing the calculation gives:
Percentage = 0.7333 × 100 = 73.33%
So, the grade percentage for 22 out of 30 is approximately 73.33%.