9/10 - 13/30 = 27/30 - 13/30 = 14/30 = 7/15
19/20 minus 11/12 = 1/30
21/30 - 8/30 = 13/30
13/30
7 and one third minus 3 and 9 tenths is six and 13 over 30 3 and 13/30
9/10 - 13/30 = 27/30 - 13/30 = 14/30 = 7/15
19/20 minus 11/12 = 1/30
-0.02
21/30 - 8/30 = 13/30
13/30
7 and one third minus 3 and 9 tenths is six and 13 over 30 3 and 13/30
2 minus 5/6 = 11/6
10 minus -20 is 30.
3/10 - 11/15= 9/30 - 22/30 = -13/30
30 - 20 = 10
50 - 20 = 30
11/15 minus 3/10 = 13/30