how to find percentage of marks

3 hours ago 5
Nature
Error: Message: Stacktrace: #0 0x55b16280c75a #1 0x55b1622bf4b0 #2 0x55b1623109b3 #3 0x55b162310ba1 #4 0x55b16235f1f4 #5 0x55b1623365bd #6 0x55b16235c5e0 #7 0x55b162336363 #8 0x55b162302d63 #9 0x55b1623039c1 #10 0x55b1627d1a6b #11 0x55b1627d5951 #12 0x55b1627b9b62 #13 0x55b1627d64c4 #14 0x55b16279e13f #15 0x55b1627fa6f8 #16 0x55b1627fa8d6 #17 0x55b16280b5a6 #18 0x7fe71ce55ac3