If you would like to calculate the sum of 1/6, 2/3, and 1/4, you can do this using the following steps:
the sum of 1/6, 2/3, and 1/4:
1/6 + 2/3 + 1/4 = 2/12 + 8/12 + 3/12 = (2 + 8 + 3) / 12 = 13/12 = 1 1/12
The correct result would be C. 13/12, or 1 1/12.