3.1 repeating, as a rational fraction is 28/9.
12/28
fraction which is equivalent to 3 out of 7 = 6/14, 9/21, 12/28,...
2.9 would be 2 9/10. To make that into a fraction, just make the 9 9 tenths (9/10), and add the 2 in front of it.
9.33... repeating is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 84/9. You can simplify this rational fraction if you so wish.
To express 3.11111111111111111 as a fraction, it can be simplified as 3 1/9 or 28/9.
9/28
28/9
It is 28/9.
3.1 repeating, as a rational fraction is 28/9.
28/36 = 7/9
12/28
28/9 = 26/9
0.4444
28/36 = 7/9
91
7/9