Percentage of:

Question

As of early 2014, the world's population was about 7.2 billion people. the population of the United States was 317 million. In early 2014, what percentage of the world's population was the U.S. population? Round your answer as a percentage to one decimal place.

Answer 1

Two ways this can be done:

 

317 million / 7.2 billion                change billions to millions

317 million / 7200 million

317 / 7200

0.0440277778

 

Let's say 4.4%

 

317 million / 7.2 billion

3.17 x 10⁵ / 7.2 x 10⁶

0.440277778 x 10^-1

0.044027778

 

4.4% again

 

Answer 2

",,, what percentage of the world's population was the U.S. population?"

 

( (US Population)/(world's population) )*100%

 

( (317,000,000) / (7,200,000,000) ) *100%

 

( (317)/(7200) ) * 100%

 

(0.044028) * 100%

 

 4.4028%

 

4.4%   (rounded to one decimal place)