A math teacher graded 45 problems in 3/5 of an hour. At that rate, how many problems can she grade in one hour

75

Step-by-step explanation:

45*1/3=15

15*5=75

Answer: 75 problems

Step-by-step explanation:

3/5 of an hour is the same as 3/5 x one hour.

one hour is the same as 60 minutes, this means that 3/5 of an hour is the same as:

3/5 x 60 = 36 minutes

This means that, the teacher graded 45 problems in 36 minutes. then in 1 minutes;

The teacher will grade 45/36 problems

so in 60 minutes;

the teacher will grade 45/36 x 60 = 75 problems