3/5
1/3
11/15 is in its simplest form.
10/15 = 2/3
No, nine twelfths in its simplest form is three fourths.
Two fifteens is 30 in decimal form. If you mean what is two fifteenths in decimal form, it's 0.133 recurring.
Nine over 21 in its simplest form is 3/7
It is already in its simplest form.
9/11 is in its simplest form.
9/8 is in its simplest form.
9/14 is in its simplest form.
9/20 is in its simplest form.
9/10 is the simplest form.