Hey Kunal,

You can simply calculate the percentage of your best four subjects as you do it with a total of 100 marks.

Calculate the total of Maximum marks of four subjects.i.e., 75+75+75+75= 300

Then, calculate the total obtained marks in all the four subjects out of 300.

Then follow the simple formula of calculating the percentage, i.e., (total obtained marks in four subjects ×100 ) ÷ 300 .

This is will help you to calculate the percentage of your best four subjects.

Also I suggest to talk to the DU officials or contact them through the official website of DU for further queries.

Hope that helps. :)