Converting to twentieths it is fifteen twentieths minus sixteen twentieths, so the result is minus one twentieth.
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.
4/50 minus 3/5 is -13/25
5 is 25 fifths, 3 x 4 fifths is 12 fifths so difference is 13 fifths or 2.6 or two and three fifths.
3 9/10.
1 and 4 fifths.
4/5 minus 3/4 is 1/20.
15+4/5-12=3+4/5