What is a 20 out of 22?

Without any additional context, it is difficult to provide specific information about "20 out of 22." It could refer to a percentage (i.e., achieving 20 out of 22 correct answers on a test, which is approximately 91%), a score (i.e., achieving a 20 out of 22 on a particular assignment), or some other measurement.

If you provide more details about the context in which "20 out of 22" is being used, I would be happy to offer additional information.