4 billion.
590909090909.09
Sixteen point two billion is how I would write it.
66%
66.67%
2.666 recurring
670,000
2/3 as a percentage of 1 billion = 2/3 * 100/1000000000 = 0.00000006666667
3/3 of a billion = billion
It is 66.666... (repeating).
you get a calculator!
8/12