
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
At the beginning of the year, a stock was bought for 8000 rubles. At the end of the year, it was sold for 400 rubles more. Determine (excluding taxes) the annual return on this transaction in percentage.

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