No number is better or worse than any other. Besides, it depends on what you want the number for.
10 and 11/18
20/18 = 10/9 = 11/9
18
26
18 over 11 as a mixed number = 17/11
(18 + 18 + 11 + 7 + 6 + 11 + 10 + 20 + 7)/9= 12========The mean, also often called the "average", is1/9 of (18 + 18 + 11 + 7 + 6 + 11 + 10 + 20 + 7)
11/18 cannot be simplified - 11 is a prime number !
180/110 = 18 x 10/11 x 10 = 18/11 = 17/11
14, which is the middle number when they are listed in order.
-18 is less than -11 or -18 < -11
You haven't specified which side of the ratio was to be greatest. The greatest difference is 6 to 11. This narrowly is greater than 10 to 18 (6/(11+6) compared to 10/(18+10)
18 minutes before 11 is the same as 10:42.