Minus one tenth.
Two and Two Fifths
9/10
one tenths
0.3 or 3/10
4/5 minus 1/2 = 3/10
minus three fifths
4 and two fifths
3 9/10.
Negative 5 and three tenths.
Call it 21 fifths minus 13 fifths, ie 8 fifths which is one-and-three-fifths
two fifths
either one half or five tenths both are correct