A spinner is a circle cut into three sectors…

Step 1. The green angle. $360 - 150 - 120 = 90$ degrees.

Step 2. Each colour. $P(\text{red}) = \dfrac{150}{360} = \dfrac{5}{12} \approx 0.4167$. $P(\text{blue}) = \dfrac{120}{360} = \dfrac{1}{3} \approx 0.3333$. $P(\text{green}) = \dfrac{90}{360} = 0.25$.

Step 3. Not red. $1 - \dfrac{5}{12} = \dfrac{7}{12} \approx 0.5833$.