grade yetesetehn be credit hour tabezaleh...lemsale yehone course A kametah 4 malet new esun be credit hour tabezawaleh...beka eyandandun grade be credit hour abzteh ...le credit hour dmr takaflaleh... eg course 1 A= 4 credit 4 course 2 B+ =3.5 credit 3 course 3 A- = 3.75 credit 3 then 4*4 +3.5*3+3.75*3 divided by 4+3+3. here is it ur grade.