To calculate the percent error, you can use the following formula:
\[ \text{Percent Error} = \left| \frac{\text{Measured Value} - \text{Expected Value}}{\text{Expected Value}} \right| \times 100\]
Substitute the values:
\[ \text{Percent Error} = \left| \frac{45 - 55}{55} \right| \times 100\]
Calculate to find the percent error.
Answer: The percent error in Rory's workout duration is \( \frac{10}{55} \times 100 \), which is approximately 18.18%.
