if I score 70 out of 100 in physics of 2020 board exam it will in total percentage of board marks 2020
Hi,
Well percentage is calculated by totalling marks obtained in certain number of subjects. In cbse usually this is five subjects and then in icse it is four subjects and thein different state boards it differs. If you somehow score much better in other subjects then your percentage will eventually get balanced.
I hope my answer helps.
All the best.