To simplify the fraction 9/12, we need to find the greatest common divisor (GCD) of the numerator (9) and the denominator (12).
The GCD of 9 and 12 is 3.
Now, we divide both the numerator and the denominator by their GCD:
9 ÷ 3 = 3
12 ÷ 3 = 4
So, 9/12 simplified is 3/4.
None of the responses you provided match this answer. The correct simplified form of 9/12 is 3/4.