The answer two 50 minus 20 is 30.
21
negative six
To do this, first we convert to twenty-eights. That gives us eight twenty-eights minus seven twenty-eights which equals one twenty-eight.
214
14 and two thirds
71 - 22 = 49
11/3
Negative twenty nine minus negative twenty one is negative eight.
2/9 minus 5/27 = 1/27
220 - 153 = 67
seventeen twenty forths