To calculate the percent error, we need the true value or accepted value of the measurement to compare against. Percent error is typically calculated using the formula:
\[ \text{Percent Error} = \left( \frac{| \text{Measured Value} - \text{True Value} |}{\text{True Value}} \right) \times 100% \]
However, if we only have a measurement of 5 yards and no true value provided, we cannot calculate a percent error.
If you have a specific true value in mind for the measurement of 5 yards, please provide that, and I can help you calculate the percent error!