
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
Robbers filled a chest to the top with golden and silver sand, with double the volume of golden sand compared to silver sand. Ali Baba calculated that if half of the silver sand is removed and the chest is topped up with golden sand, the value of the chest would increase by 20 percent. By how much and by what percentage will the value of the chest change if half of the golden sand is removed and the chest is topped up with silver sand?

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