Answer: 13/42
Explanation:
You did 1/6 of the work for the week yesterday.
You did 1/7 of the work for the week today.
1/6 (from yesterday) + 1/7 (from today)
(1/6) * (7/7) = 7/42
(1/7) * (6/6) = 6/42
7/42 + 6/42 = (7 + 6)/42 = 13/42
You have completed 13/42 of the work that you need to do for the week.