Answer:
4 1/6
Explanation:
We have:

First, let's simplify 2/6 to 1/3
Now, we have
4 1/2-1/3
We now need to find the common denominator of 2 and 3
2: 2, 4, 6, 8, 10...
3: 3, 6, 9...
We find that 6 is the smallest number that is a multiple of both 2 and 3.
Making the denominators into 6:
4 3/6-2/6 = 4 1/6