Using another approach, first take the 2 wholes from the 4 wholes. Then take 4/6 out of one of the wholes that is left, and don't forget to add in the original 1/6 from 4 1/6 .

Hint: Check your answer to this problem by using estimation:

4 1/6 is close to 4.
2 4/6 is close to 2 1/2 .       Estimate: 4 – 2 1/2 = 1 1/2