
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 drug underwent two price reductions, changing from 50 yuan per box to 40.5 yuan per box. Calculate the average percentage rate of reduction per decrease.

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