In a mathematics class, 63 students received an A on the third test, which is 175% of the students who received an A on the second test. How many students received an A on the second test?

From the given question:
There are given that the total number of students is 63.
Now,
According to the question, 175% of the student received an A.
So,
[tex]\frac{63}{1.75}=36[/tex]Hence, 36 students received an A on the second test.