
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 fish pond contains 1000 grass carp, 500 carp, and some crucian carp. The owner of the fish pond found through multiple fishing experiments that the frequency of catching crucian carp is stable at around 0.25. If the owner randomly catches a fish in the pond, the probability of catching a grass carp is approximately ______.

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