3/9 + 9/20 = 60/180 + 81/180 = 141/180
7/9 + 5/9 = 12/9 = 4/3 7/9 - 5/9 = 2/9
The sum of 5/9 and 2/9 is 7/9.
The sum of 1/9 and 2/9 = 1/3
The sum of 1/3 and 5/9 is 8/9.
The sum of 3/8 and 4/9 is 59/72.
The sum of 4/9 and 1/9 is 5/9.
The sum of 7/9 and 2/3 is 1 4/9.
The sum of 7/9 and 1/3 is 1 1/9
The sum of 4/9 and 3/4 is 1 7/36
The sum of 4/9 and 1/9 is 5/9.
4/3 = 12/9 then 2/9 + 12/9 = 14/9 = 1 and 5/9
5/9 + 1/9 = 6/9 (6 Ninths)This is also equivalent to 2/3.