The percentage of Australian shift workers who work rotating or irregular shifts is closest to?  50%   20%   10%   80%

To determine the percentage of Australian shift workers who work rotating or irregular shifts, we can refer to statistics and research studies available on the topic.

As of recent reports, approximately 20% of Australian workers are engaged in shift work, and among those, a significant portion work rotating or irregular shifts. Generally, it has been found that the percentage of shift workers who engage in such types of shifts tends to be around 50%.

This information suggests that the answer is closest to 50%.

So, the available options would lead us to conclude that the percentage of Australian shift workers who work rotating or irregular shifts is closest to 50%.