To do this, first we convert to twenty-eights. That gives us eight twenty-eights minus seven twenty-eights which equals one twenty-eight.
two forty-fifths or one twenty-eighth
11/21 (eleven over twenty-one)
38 over 21 or thirty-eight twenty-firsts
220 - 153 = 67
negative ten sevenths
6 and 2 sevenths
one and five sevenths