Answer: 0.61%
Explanation:
To calculate the percentage error, we first need to find the absolute difference between the actual score needed to win and the estimated score Shaun White thought he needed:
|936.2 - 930.5| = 5.7
The actual score needed to win (936.2) minus the estimated score Shaun White thought he needed (930.5) gives us an absolute difference of 5.7.
To find the percentage error, we need to divide the absolute difference by the actual score needed to win and then multiply by 100:
(5.7 / 936.2) x 100% = 0.61%
Therefore, Shaun White was wrong by 0.61% in his estimation of the score needed to win the gold medal at the X games for snowboarding.