Final answer:
The basketball player's prediction was off by approximately 14.71%, which is calculated using the provided values in the percent error formula.
Step-by-step explanation:
The percent error in the basketball player's prediction can be calculated using the formula:
Percent Error = \(|\frac{{Actual Value - Predicted Value}}{{Actual Value}}| \times 100\)
In this case:
- Actual Value (A) = 102 points
- Predicted Value (P) = 87 points
Substituting the values into the formula:
Percent Error = \(|\frac{{102 - 87}}{{102}}| \times 100\) = \(|\frac{{15}}{{102}}| \times 100\)
Percent Error = |0.1471 \times 100|
Percent Error = 14.71%
Therefore, the player's prediction was off by approximately 14.71%.