Answer:
s = 22t or [tex]\frac{t}{s} = \frac{1}{22}[/tex], when s is students and t is teachers.
Step-by-step explanation:
I. Given t = teacher, s = student
When 1 teacher per 22 students so...
    s = 22t
If there're 10 teachers
    s = 22(10)
      = 220 or [tex]\frac{t}{s} = \frac{1}{22}[/tex]
Hope that help :)