11. 3) НОД(39; 130) = 13
39 = 3*13
130 = 2*5*13
39/130 = 3/10
4) НОД(64; 144) = 2*2*2*2 = 16
64 = 2*2*2*2*2*2
144 = 2*2*2*2*3*3
64/144 = 4/9
12.
3) НОК(25; 15) =3*5*5 = 75
25 = 5*5
15 = 3*5
21/75 и 10/75
4) НОК(16; 24) = 2*2*2*2*3 = 48
16 = 2*2*2*2
24 = 2*2*2*3
9/48 и 10/48