Opposite event rule: The probability that event A happens is equal to 1 (100%) minus the probability that A doesn't happens.
In the given case event A is he doest NOT make his next free throw shot.
And the probability that event A doesn't happen is the given probability 86%.
Then, the probability that he doest NOT make his next free throw shot is: 14%
![P(A)=100-86=14](https://img.qammunity.org/2023/formulas/mathematics/college/7asc3vwwwyjp9te7fw68vro59njr0kc6j9.png)