Hi Rajat, 

Please specify the board you are appearing from. Generally, the rule for calculating percentage by the CBSE Board is the best of 5 rule. Here apart from English, which is a language subject, you can consider the best among the left-out subjects. While, CBSE will calculate your percentage, it will automatically exclude that one subject, aprat from English, where you have scored the lowest. Therefore, between Physical Education and Painting, you can choose to enter the marks of the subject, you have scored more in. 

Thanks,