The results of the three students in the long jump are: a 4 and 2 / 3 meters, B 4 and 15 / 7 meters, C 4 and 12 / 11 meters. Who is the first?

The results of the three students in the long jump are: a 4 and 2 / 3 meters, B 4 and 15 / 7 meters, C 4 and 12 / 11 meters. Who is the first?

The integer part is 4, just compare the true fraction part
2/3=40/60
7/15=28/60
11/12=55/60
55/60>40/60>28/60
C is the first