Three fifths of a piece.
23/5
minus three fifths
Assuming that you mean "fifths", the answer is three fifths.
3.3333333333 +/- .000000003
3
Three fifths of a piece.
16.
123
23/5
23
5/5 + 3/5 = 8/5 8 fifths.
Sixty six.
1
15
minus three fifths
Assuming that you mean "fifths", the answer is three fifths.