9/15 = 3/5
Nine fifteenths in simplest form is three fifths. Since the Greatest Common Factor (GCF) they have is 3 (you may make a 'T' chart or a Factor Tree to find out), divide the numerator (top number of fraction) and the denominator (bottom number of fraction) both by three. So the simplest form of nine fifteenths is three fifths.
11/15 is in its simplest form.
It's already in simplest form.
16/15 is in its simplest form.
7/15 is in its simplest form.
17/15 is in its simplest form.
one third
4/9 plus 7/15 = 41/45 in its simplest form
it is already in simplest form.
2/3
3/5 :)