Divide the 4 billion by 64 billion, and multiply the result by 100 to convert it into a percentage. Please note that currently (as of 2012) there aren't that many people on Earth.
If you mean there will be 4 billion winners from a population of 64 billion people - the odds are 16:1
about 55% which is about 3.7 billion :)
one billion
About 20% Johnny Stewart
1 billion people worldwide are illiterate.
1.3 Billion Black people in the WORLD. 6.7 billion is the total Human population as of January 2009, so about 20%
300 people/7,000,000,000 people= 4.28571429 × 10-8 or .0000000428571429%
Your question is actually meaningless without context. But allow me to propose one. Let us say that the question is, 3.5 billion is what percentage of the current total human population of nearly 7 billion people. The answer then is nearly 50%.
Some 1.1 billion people in developing countries have inadequate access to water, and 2.6 billion lack basic sanitation.
In 1990 there were 1.3 billion women of childbearing age out of 7 billion people in the world. That's a little over 18%.
Probabilty(in finance), powers, and much more
There are more than 1 billion people who reside in India. In 2013, the percentage of people employed in India was 40 percent. About 51 percent of Indian workers are self-employed.