
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 factory earned $200$ million US dollars in foreign exchange in July. Due to the severe impact of the international environment, the foreign exchange earnings have been continuously declining. By September, the foreign exchange earnings had dropped to only $98$ million US dollars. If the average monthly decline rate of the factory is $x\%$, then the equation is _____. (It is not necessary to convert it into a general form!)

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