A fraction. (1/3)
It is: 6/18 = 1/3 in its simplest form
1/6 or 2/9
15/18 can be reduced to 5/6
An equivalent fraction to 15/18 is 5/6
8/18 or 4/9
They add up to 25/6 and (25/6)/9 = 25/54 which is the mean
38.88%
7/9
1/2
1/2
That's the same as 9/2 x 3/2 = 27/4 or 6 and 1/4
% rate = 61.11% = 11/18 * 100% = 0.6111 * 100% = 61.11%