Icse Board — Science and mathematics marks

I Got my marksheet and found that I got 43 marks in science and 57 in math out of 100. In which I only received 24/80 in science theory and 37/80 in math theory. Whereas as in other subjects I got my marks in 80's out of 100. Please see to this. Hope you help me in resolving my issue.in internal examination I got more than 80% but in final it's only 68%..plzzz help🙏🙏🙏😭