Yes, 2/35.
6
105/90 = 7/6 or 11/6
2/105 cannot be reduced.
No.
50/105 = 10/21
Yes. Divide 12 and 105 by 3. You then get 4 over 35 or 4/35.
Yes, to 16/35
Yes: 1/7
105/98 reduces to 15/14. 105/7 = 15 and 98/7 = 14
6 over 18 is reduced to 1/3
6 over 8 reduced = 3/4
6/25 cannot be reduced.