a) 236-23/90 = 213/90 = 71/30
b) 129-12/90 = 117/90 = 13/10
c) 3702-370/900 = 3332/90 = 1666/45
d) 12417-12/9990 = 12405/9990 = 2481/1998
e) 203-2/9900 = 201/9900 = 67/3300
f) 10327-103/990 = 10224/990 = 5112/495 = 1704/165 = 568/55
g) 11473-1147/900 = 10326/900 = 3442/300
h) 21-2/9000 = 19/9000