plssss ajutor


scrieti in oridine crescatoare fractiile:
a) 3/5, 7/10, 15/12, 29/30
b) 4/3, 1/2, 3/4, 7/10, 13/12, 13/30, 17/60
c) 1/5, 5/12, 7/24, 11/6, 13/2, 9/8, 17/4
d) 299/300 si 399/400 pls, explicati-mi, dau coroana​​