Fraction of students enrolled in Chinese = 
Fraction of students enrolled in French = 
Fraction of students enrolled in Spanish =
Solution:
Total number of students = 51 + 33 + 42
= 126
Number of students enrolled in Chinese = 51
Fraction of students enrolled in Chinese

Fraction of students enrolled in Chinese = 
Number of students enrolled in French = 33
Fraction of students enrolled in French

Fraction of students enrolled in French = 
Number of students enrolled in Spanish = 42
Fraction of students enrolled in Spanish

Fraction of students enrolled in Spanish =