
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
Zyaka decided to buy a krumblik. In the store, they also sold kryambliks. Zyka bought a kryamblik and received coupons worth $50\%$ of the cost of the kryamblik. He used these coupons to pay $20\%$ of the cost of the krumblik. By paying the remaining amount, he also bought the krumblik. By what percentage did Zyka's expenses for buying both the kryamblik and the krumblik exceed his initially planned expenses for buying only the krumblik?

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