Final answer:
The Business department has the highest probability of new student enrollment at 22.7%, compared to other departments.
Step-by-step explanation:
Based on the current data, the department with the highest probability of "new student enrollment" is Business with a percentage of 22.7%. This figure is higher than the other departments listed, such as Humanities, Science, and Math, of which the provided data does not specify their exact percentages. To determine the most probable department for new student enrollment, one merely needs to compare the given percentages and select the department with the highest number.