In 2005, folgers sold $505 million of nondecaf coffee. the total sale of nondecaf coffee that year was $2.012 billion. what percent of the total nondecaf coffee sales was due to folgers? write answer as a decimal rounded to two figures.

1. We have to calculate what percent of 2.012 billion $ is 505 million $

2.
 2.012 billion is 2012 million (we know that "billion" is "million" * 1000)

505 is approximately 1/4 of 2012 so 25% is approximately what we expect.

3. 
2.012-------100%
505----------x%

so  percent