Answer:
fifth graders: 93 shirts
Sixth graders:
teachers:
Explanation:
If you multiply 300 by 31% or 0.31, you get 93 shirts for fifth graders
If you multiply 300 by 52% or 0.52, you get 156 shirts for sixth graders
add 93 + 156 and subtract from 300 and you get 51 shirts for the teachers