Answer: 5.26% error.
Explanation:
The percent error in this case can be calculated using the formula:
| (forecasted value - actual value) / actual value | x 100%
Substituting the given values in the formula, we get:
| (76 - 80) / 80 | x 100% = 5 / 80 x 100% = 0.0625 x 100% = 6.25%
Therefore, the percent error is 6.25%.