21 students have vanilla ice cream and 4 students have chocolate ice cream. What is the ratio of the number of students who have vanilla to the total number of students?
Write your answer as a fraction. Use a slash ( / ) to separate the numerator and denominator.
The total number of students is 21 + 4 = <<21+4=25>>25.
The ratio of the number of students who have vanilla to the total number of students is 21/25.