First, let's simplify the expression inside the parentheses:
0.25 - 1.64/0.8= 0.25 - 2.05
Now, let's simplify the expression:
2 1/6 + 2 1/12 (-1.8)= 2 1/6 + 2 1/12 -1.8= 2 1/6 - 2 1/6= 0
Therefore, the final answer is 0.
First, let's simplify the expression inside the parentheses:
0.25 - 1.64/0.8
= 0.25 - 2.05
Now, let's simplify the expression:
2 1/6 + 2 1/12 (-1.8)
= 2 1/6 + 2 1/12 -1.8
= 2 1/6 - 2 1/6
= 0
Therefore, the final answer is 0.