To find the ratio of the number of students sitting on the bleachers to the total number of students, we first need to determine the total number of students.
The number of students sitting on the bleachers is 17, and the number sitting on the floor is 62.
Total number of students = 17 + 62 = 79
Now, we can express the ratio of the students on the bleachers to the total number of students:
Ratio = Number of students on bleachers : Total number of students = 17 : 79
So, the ratio of the number of students sitting on the bleachers to the total number of students is 17:79.