Tommy's batting average is this season is 0.275. this means that he had hit in 27.5% of his at-bats. if tommy had 11 hits so far this season, how many at-bats has he had

Tommy's batting average is this season is 0.275.
This means that he had hit in 27.5% of his at-bats.
 Now, If Tommy had 11 hits so far this season, how manyat-bats has he had.
=> 11 * 0.275 = 3.025 is the average at bats that he have based on the 11 hits he has so far.

Yes you are correct