
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Since the implementation of the "targeted poverty alleviation" policy in the country, the economy in impoverished areas has developed rapidly, and the number of impoverished people has decreased significantly. In a certain region, there were 40,000 impoverished people at the beginning of the year 2018. Through the efforts of various sectors of society, the number of impoverished people decreased to 10,000 at the beginning of the year 2020. The annual average decline rate of impoverished people in this region from the beginning of 2018 to the beginning of 2020 is ____.

Present the answer in LaTex format: \boxed{Your answer}
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