10/12
19/12 or 1 and 7/12
10/12 + 8/12 = 18/12 or 1 and 6/12 or 3/2 or 1.5
-7/12 + 10/12 = 3/12 = 1/4
1 17/60
1/4 + 5/6 = 3/12 + 10/12 = 13/12 = 1 and 1/12
183/90 or 2 and 1/30
6/12 = 1/2 = 5/10 so 6/12 + 3/10 = 5/10 + 3/10 = 8/10 = 4/5
1 over 3 plus 1 over 12 equals 5 over 12
1/12 + 4/6 = 1/12 + 8/12 = 9/12 = 3/4.3 over 4 is 1 over 12 plus 4 over 6.
12.5 or 12 1/2
85/66, which is the same as 1 and 19/66.