Krystal observed that 85% of the students at a library liked reading mystery stories. If 30 students at the library didn't like reading mystery stories the number of students at the library who like reading mystery stories was_______
Assuming that the 100 – 85 = 15% are those who do not like reading mystery stories. It can solved by:
Let x = number of students in the library
30 = .15x
X = 200
Therefore, number of students in the library who liked reading mystery stories are 200(0.85) = 170.
