I would start with the (2+2)
Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.

8 / 2(2+2)
Parentheses work first: 2+2 = 4

8 / 2 (4)

Next, we take both multiplication and division as we come across them, from left to right: 8 / 2 = 4

4 (4) = 16