What would my gpa be and what could i improve on?

A = 4.0, A - = 3.7, B+ = 3.3, B = 3.0, B- = 2.7. Multiply the number grade for each cl by the number of credits it was worth (because art and sports aren't worth as much as math and science), add them all up, and divide by the total number of credits you took.