There are 40 students in a mathematics class. If 5 students were absent on Monday, what percentage of the class was absent on that day?

Answer 1

The number of students absent on Monday is 5.
So, the total number of students present on Monday is 40 - 5 = <<40-5=35>>35.
Therefore, the percentage of the class that was absent on Monday is (5/40) x 100% = <<5/40*100=12.5>>12.5%. Answer: \boxed{12.5}.