To simplify \( \frac{7^9}{7^6} \) using the properties of exponents, you can subtract the exponents when dividing the same base:
\[ \frac{a^m}{a^n} = a^{m-n} \]
Applying this to your expression:
\[ \frac{7^9}{7^6} = 7^{9-6} = 7^3 \]
Therefore, the exponent in the equivalent form is \( 3 \).