Final answer:
To determine the percentage of flights that do not arrive on time, subtract the percentage of flights that do arrive on time (91.1%) from 100%. The percentage of flights that do not arrive on time for XYZ Airlines is 8.9%.
Step-by-step explanation:
To determine the percentage of flights that do not arrive on time, we can subtract the percentage of flights that do arrive on time from 100%. In this case, XYZ Airlines reports that 91.1% of its flights arrive on time.
Therefore, the percentage of flights that do not arrive on time would be:
100% - 91.1% = 8.9%
Therefore, 8.9% of XYZ Airlines' flights do not arrive on time.