To determine whether (9.11) is greater than (9.9), let's compare the two numbers step by step.

1. Compare the Whole Number Parts:

   • Both numbers have the same whole number part: (9).

2. Compare the Decimal Parts:

   • For (9.11):
     • Tenths place: (1)
     • Hundredths place: (1)
   • For (9.9):
     • Tenths place: (9)
     • Since there's no hundredths place, we can consider it as (9.90) for easier comparison.

3. Analyze the Tenths Place:

   • (1) (from (9.11)) is less than (9) (from (9.9)).

Since the tenths place in (9.11) is less than that in (9.9), we can conclude:

[ \boxed{9.11 \text{ is less than } 9.9} ]