No.
3/8
Yes, to 3/8
Yes, 108/8 = 27/2
27/8
Yes, 27 over 30 can be reduced to 9 over 10.
27 over 50 is already in reduced form.
27/10
1820 over 54 reduced = 910/27
54 over 100 can be reduced to 27/50
6 over 8 reduced = 3/4
The fraction 27/100 cannot be reduced any further.