Assuming that you mean "fifths", the answer is three fifths.
0.3 or 3/10
One whole minus two fifths is three fifths.
It is: 4/5 minus 3/10 = 1/2
3/4
3 and 3/5
4/5
4/5 minus 1/5 = 3/5
3 and 3/5
0.3 or 3/10
Assuming that you mean "fifths", the answer is three fifths.
5 is 25 fifths, 3 x 4 fifths is 12 fifths so difference is 13 fifths or 2.6 or two and three fifths.
4/50 minus 3/5 is -13/25
3 9/10.
4/5 minus 3/4 is 1/20.
1 and 4 fifths.
15+4/5-12=3+4/5