The students in Bob's class got to choose whether to visit the zoo or the aquarium. 16 students went to the zoo and 11 students went to the aquarium. What is the ratio of the number of students who went to the aquarium to the total number of students?
Write your answer as two numbers separated by a colon (for example, 2:3).
The total number of students is 16 + 11 = <<16+11=27>>27 students.
The ratio of students who went to the aquarium to the total number of students is therefore 11:27. Answer: \boxed{11:27}.