am nevoie repeddeeee

a. 2/3, 3/4, 3/7,8/10,8/12,11/13,39/93,205/502
c. 3/2, 5/4, 8/6, 7/3,9/8,15/12,23/14,74/47,103/81
b. 5/5,6/6,14/14,9/9