To convert radians to degrees, you can use the conversion factor \(180^\circ/\pi\).
Given \( \frac{7\pi}{9} \) radians, you can convert it to degrees as follows:
\[ \frac{7\pi}{9} \times \frac{180^\circ}{\pi} \]
The \(\pi\) cancels out:
\[ \frac{7 \times 180^\circ}{9} \]
Calculating the multiplication first:
\[ 7 \times 180 = 1260 \]
Now divide by 9:
\[ \frac{1260}{9} = 140^\circ \]
So, \( \frac{7\pi}{9} \) radians is equal to \( 140^\circ \).
The answer is 140°.