In a math class of 40 students, there are 21 female students. Which of the following does NOT represent a ratio of the number of girls in the classroom to the total number of students?

19/40
0.53
53%
21/40

3 answers

19/40 because there is no number 19, and there is no math required to get another answer.
Thanks Again so much!
It asks for girls. 19 is boys I suspect.
21/40 = 0.525 which is 0.53 rounded to 2 figures
0.53 * 100 = 53 %