
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 new car gives $100\%$ better fuel efficiency, measured in kilometers per liter, than his old car. His new car uses diesel fuel, which is $25\%$ more expensive per liter than the gasoline his old car used. Determine the percent by which Elmer will save money if he uses his new car instead of his old car for a long trip.

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