
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
Elmer's latest car offers $40\%$ more fuel efficiency, measured in kilometers per liter, than his old car. The new car, using diesel, incurs a cost that is $30\%$ higher per liter compared to the gasoline for his old car. If Elmer plans to drive 600 kilometers, calculate the percent he will save on fuel costs using his new car instead of his old car.

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