How do you calculate your GPA? I don't get it!?

Question

if my grades were 1.3 for a 5 credit class, 3.0 for a 1 credit class, 4.0 for a 2 credit class, and 2.5 for a 5 credit class... how do i get a GPA of 2.31? how is that calculated?

Answer 1

1.3)(5) + (3.0)(1) + (4.0)(2) + (2.5)(5) = 30 /

Answer 2

(1.3)(5) + (3.0)(1) + (4.0)(2) + (2.5)(5) = 30

30/13 credits = 2.31

Answer 3

(1.3*5+3.0*1+4.0*2+2.5*5)/13=2.31