Answer: 1/15 classrooms per minute
Step-by-step explanation:
Find the janitor's rate in classrooms per minute. Divide
1/3
of a classroom by 5 minutes.
To divide by 5, multiply by its reciprocal, 1/5
.
1/3 ÷5 = 1/3 * 1/5 = 1/15
The janitor is mopping at a rate of 1/15 of a classroom per minute.
