1820 over 54 reduced = 910/27
54 over 100 can be reduced to 27/50
75 over 100 reduced = 3/4
75/54=1 and 21/54
30/75 is reduced to 2/5.
75/16 cannot be reduced further.
54/78 = 9/13
Yes because 75/100 can be reduced to 3/4
54/180 = 3/10
48/54 = 8/9
54/99 = 6/11
54/140 = 27/70