#### Answer

1/8

#### Work Step by Step

To simplify a fraction, we need to find the greatest common factor for the numbers in the numerator and the denominator. Next, we divide both the numerator and the denominator by this number to get the simplified form of the fraction. The greatest common factor of 9 and 72 is 9, so we divide the fraction by 9/9 to get the simplified form: 1/8.