To find the percentage of all students who prefer hot dogs, we can use the total number of students who chose hot dogs and the overall total number of students.
From the table:
- Total number of students who prefer hot dogs = 55
- Total number of students surveyed = 200
Now, to calculate the percentage:
\[ \text{Percentage of students who prefer hot dogs} = \left( \frac{\text{Number of hot dog preferences}}{\text{Total number of students}} \right) \times 100 \]
Substituting in the values:
\[ \text{Percentage} = \left( \frac{55}{200} \right) \times 100 = 27.5% \]
Therefore, 27.5% of all students prefer hot dogs.