The number of female students in a class is 3 / 7 of the total number of students in the class. What is the number of female students compared with that of male students? It's better to explain the reason~

The number of female students in a class is 3 / 7 of the total number of students in the class. What is the number of female students compared with that of male students? It's better to explain the reason~

three-fourths