9.9 is larger than 9.11.

To compare decimals, I can align the decimal points:
- 9.9 = 9.90
- 9.11 = 9.11

Comparing digit by digit from left to right:
- Both have 9 in the ones place
- In the tenths place: 9 > 1

Therefore, 9.9 > 9.11
