А) 3/7 > 3/14, т.к. 6/14 > 3/14
b) 9/11 > 5/22, т.к. 18/22 > 5/22
c) 5/8 > 2/7, т.к. 35/56 > 16/56
d) 5/6 > 1/7, т.к. 35/42 > 6/42
e) 2/3; 3/4; 7/9 = 24/36; 27/36; 28/36
f) 1/6; 2/7; 19/21 = 7/42; 12/42; 38/42
g) 3/8; 5/12; 13/24 = 9/24; 10/24; 13/24
h) 7/36; 1/8; 2/9 = 14/72; 9/72; 16/72