12= 2x2x3
55=5x11
There are no common prime factors so it can not be reduced.
Yes to 11/12
It equals to 1 and 34 over 55
55/100 = 11/20
There are no common factors of 38 and 55 except 1, so the answer is no it can't be reduced.
55/1 is 55 anything divided by 1 is itself
1/5
3/5
8055/78 cannot be reduced.
-42/55
55/72 cannot be reduced any further.
1/12 can't be reduced.
55/100 and the LCM is 5 so the answer is: 11/20.