To convert radians to degrees, you can use the conversion formula:
\[ \text{degrees} = \text{radians} \times \left(\frac{180}{\pi}\right) \]
For 2.5 radians:
\[ \text{degrees} = 2.5 \times \left(\frac{180}{\pi}\right) \approx 2.5 \times 57.2958 \approx 143.24° \]
So, the answer is 143.24°.