One-third is the same as five-fifteenths. Two-fifths is the same as six-fifteenths. Five-fifteenths plus six-fifteenths is eleven-fifteenths. One, or fifteen-fifteenths, minus eleven-fifteenths is four-fifteenths.
Two fifths is six fifteenths. Eleven fifteenths minus six fifteenths is five fifteenths, which is also one third.
One third 1/3
8/15, 8 fifteenths
7 and 8 fifteenths
YES ... to prove it, divide both the numerator and the denominator of 5/15 by 5 and you will get 1/3
one-third, or 1/3, or 0.3
No, after you've cut one-third and three-ninths, which is another third, there are only five-fifteenths left!