Of the 6.25 billion people in the world, 310 million live in North America. What percent of the world's population lives in North America?

5% approx

Explanation:

Given that

Number of people in the world = 6.25 billion

And the number of people live in North America = 310 million

So, the percentage of the world population lives in North America would be

= (Number of people live in North America : Number of people in the world) * 100

= (310 million : 6.25 billion) * 100

= 5% approx