(156-96 :12):(4:2)=

Let's break down the expression step by step.

1. First, we solve the inner part:
   \( 156 - 96 = 60 \)

2. Next, divide by 12:
   \( 60 \div 12 = 5 \)

3. Now, we have the expression:
   \( 5 : (4 : 2) \)

4. Solve \( 4 : 2 \):
   \( 4 \div 2 = 2 \)

5. Now, we simplify the expression \( 5 : 2 \):
   \( 5 \div 2 = 2.5 \)

Thus, the final result of the original expression \( (156 - 96 : 12) : (4 : 2) \) is \( 2.5 \).