
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
A certain medicine was originally priced at 16 yuan per box. In response to the national call to reduce the medical expenses for the public, the price was reduced twice in succession, and now the selling price is 9 yuan per box. What is the average percentage decrease in price per reduction?

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