pls am nevoie urgent dau coroana

Răspuns:
3;5;8 cmmmc=120
a) (24+56+75)/120=155/120=31/24
b)(73/20)/(289/132)=2409/1445
c) (227/20)/(109/8)=(227×8)/(20×109)=
1656/2180=414/545
d) (31/12)/(17/6)=(31/12)×(6/17)=
(31/2)×(1/17)=31/34