8/9 x 5/5 = 40/45
2/5 x 9/9 = 18/45
40/45 - 18/45 = 22/45
twenty-two forty-fifths
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Two thirds minus two ninths is 4 ninths. Two thirds is 6 ninths. 6 ninths minus 2 ninths is 4 ninths.
two fifths
The common denominator of four fifths and two ninths is 45.
Two and two fifths. Five minus two and three fifths = two and two fifths
minus three fifths