#### Answer

$\frac{3}{4}$

#### Work Step by Step

To find a probability $P(x)$, we want to divide the number of events in the group $x$, and divide that number by the total number of events. In this case, there are $3$ sections that are not green on the spinner, and $4$ sections in total, so P(not green) is $\frac{3}{4}$.