4/9 just subtract the numerators because the denominators are the same.
8/9 minus 5/9 is 1/3
1 and 9/12 minus 5/6 = 11/12
5/9 − 1/3 = 2/9
1/2 − 5/9 = -1/18
-1/9
9/10 minus 1/10 is 4/5
5/9 − 1/6 = 7/18
It is: 5/9 - 1/12 = 17/36
9/10 − 4/5 = 1/10
in decimals the answer is .30556
13 over 45
5 over 18