One cent = 0.01 dollar
001 of a cent = 1 cent and you will need 100 of them to make a dollar.
One thousandth of a cent. [One percent of a dollar is one cent.]
That is called a "mill". It is used, among other things, for calculating property taxes and the like.
.001
001 = one
001 is just 1 .001 is 1/1000
0.000 001 is one millionths.0.000 001 is one millionths.0.000 001 is one millionths.0.000 001 is one millionths.
9.1e - 001 = 0.91
0800 001 001
1.001
maybe 001?