In? 2008, a country used ? twenty-five percent or 100 million tons of all the grain grown that year to produce ethanol. how much grain was grown in the country in? 2008?

400,000,000 tons

Step-by-step explanation:

You could reword this sentence to ask the question, "100,000,000 is 25% of how much?"

The word "is" means equals, the percent will be .25 in decimal form, the word "of" means to multiply, and "how much" is x, our unknown.  In equation form, then, this looks like

100,000,000 = .25 × x

We will divide both sides by .25 to get that

x = 400,000,000

That's how much grain was grown in 2008

1.5%

step-by-step explanation: