
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
In 1990, the average cost of a long-distance call in Brazil was 55 cents per minute. By 2000, this cost had decreased to 23 cents per minute. In 2010, the cost further decreased to 10 cents per minute. Calculate the total percent decrease in cost per minute from 1990 to 2010.
A) 60%
B) 75%
C) 81.82%
D) 90%
E) 95%

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