#### Answer

-3

#### Work Step by Step

When taking a square root of a fraction, we take the square root of the numerator (top of the fraction) and denominator (bottom of the fraction) separately. The square root of 81 is 9, and the square root of 9 is 3, giving us an answer of 9/3, which equals 3.
However, as we can see, there is a negative outside of the square root. This means that we multiply 3 by -1, giving us our final answer: -3.