In 1990, world rice production was 350 million tons. in 1999 it had risen to 400 million tons . what was the percentage increase in world rice production between 1990 and 1999?

In 1990 rice production= 350 million tons 

In 1999 rice production = 400 million tons 

400-350= 50 million ton increase 

50/350=.1428   To calculate the percentage increase you divide the total amount increased by the initial amount to determine the percent. 

Therefore the world rice production increased by approximately 14% from 1990 to 1999. 

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."