The mode is the number that appears most frequently in the list.
The given numbers are:
\[
57, 17, 26, 90, 0, 83, 80, 26, 57, 115, 26
\]
Now, count the frequency of each number:
- 57 appears 2 times
- 17 appears 1 time
- 26 appears 3 times
- 90 appears 1 time
- 0 appears 1 time
- 83 appears 1 time
- 80 appears 1 time
- 115 appears 1 time
The number 26 appears the most (3 times), so the mode is \( 26 \).