100%.
Since ALL the people in the world ARE all the people in the world, the answer is 100%.
What is the percentage of people in the world who/which ... what?
Re-ask the question with the missing information.
almost about 39% of 100% people in the world has it ...
100%
10%
could be about 10%
6%
2%
Zero percent
.05%
50% of the world surfs
2%!! yes it is a small percentage but a good one
The answer will depend on whether you meanwhat percentage of people in Canada play volleyball, orwhat percentage of people in the world play volleyball in Canada as opposed to elsewhere.
1 the answer is 1