Call it 21 fifths minus 13 fifths, ie 8 fifths which is one-and-three-fifths
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16/5 - 14/5 = 2/5
two fifths
Seven minus 3 2/5 is 3 3/5
As these numbers have the same denominator (5), we can simply take off unit for unit: 5-2 = 3 1/5 - 3/5 = -2/5 So we get 3-2/5 which is 2 and 3/5 So the answer to 5 and one fifth minus 2 and three fifths is 2 and three fifths.
six and three fifths