16.
1.875 of them are.
minus three fifths
One third of three fifths is one fifth.
six and three fifths
No, one half is 50% and three fifths is 60%. One half also equals three sixths and not three fifths.
33/4 of them.
3
Three and four-fifths
Call it 21 fifths minus 13 fifths, ie 8 fifths which is one-and-three-fifths
Expressed with a denominator of 5, 1 3/5 is equal to 8/5 or eight fifths.
123
two fifths