a) 1/2 si 3/5 <=> 5/10 si 6/10 cmmmc [2; 5] = 10
b) 2/7 si 3/4 <=> 8/28 si 21/28 cmmmc [7; 4] = 28
c) 5/7 si 3/8 <=> 40/56 si 21/56 cmmmc [7; 8] = 56
d) 2/3 si 4/5 <=> 10/15 si 12/15 cmmmc [3; 5] = 15
e) 5/7 si 2/3 <=> 15/21 si 14/21 cmmmc [7; 3] = 21
f) 1/25 si 3/4 <=> 4/100 si 75/100 cmmmc [25; 4] = 100