According to Wikipedia, the United States of America is home to 4.44% of the earth's population with more than 317,000,000 people (as of March 2014).
According to the U.S. Census Bureau, as of March 2014 there are roughly 317,700,000 living in the U.S. out of 7,150,000,000 people living in the entire world (these numbers change constantly). Divide the number of people in the U.S. by the number of people in the world and multiply by 100 to get your answer.
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About 4.49 %
Bit less than 5%.
Slightly under 4.5%.
4.5%(2011)
4.5% (2011)
9
4
2.09% of the total US population lives in Massachusetts.
0.58% of the total US population lives in Nebraska.
1.61% of the total US population lives in Colorado.
1.14% of the total US population lives in Connecticut.
0.95% of the total US population lives in Mississippi.
4.06% of the total US population lives in Pennsylvania.
2.15% of the total US population lives in Washington.
2.03% of the total US population lives in Tennessee.
1.53% of the total US population lives in Alabama.
1.45% of the total US population lives in Louisiana.
1.39% of the total US population lives in Kentucky.
0.93% of the total US population lives in Arkansas.
0.88% of the total US population lives in Utah.
0.86% of the total US population lives in Nevada.
0.42% of the total US population lives in Maine.
2.04% of the total US population lives in Arizona.
1.85% of the total US population lives in Maryland.