Two fifths minus one third is 1/15.
one and one-third
One third is three ninths. So one ninth minus three ninths is minus two nights.
negative two-thirds
one whole
One minus two thirds is one third.
Two fifths minus one third is 1/15.
one and one-third
One minus two thirds is one third.
One minus two thirds is one third.
One third is three ninths. So one ninth minus three ninths is minus two nights.
one third
2/3
negative two-thirds
one whole
Three-sixths minus two-sixths is one-sixth.
Eight minus two thirds would be seven and one third.