1/4 (simplified from 15/60)
6 over 20 EDIT - it will simplify even further to 3/10 !
171/60 = 57/20 by dividing the numerator and the denominator by 3 which is their greatest common factor
84/60 = 7/5
1/60
60/54 = 30/27 = 10/9
No, it can only be changed into a mixed number: 97/60 = 137/60
17 over 60 cannot be simplified any further.
3 and 11 over 50, simplified. 3 and 22 over 100, not simplified.
3/1000 cannot be simplified further.
3/8 cannot be simplified.
No.