
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
The length of a rectangle is increased by $40\%$, but the width of the rectangle must be decreased to keep the area of the rectangle unchanged. By what percent must the rectangle's width be decreased?

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