305/1000 = 0.305, unless you meant three hundred and five thousandths, which would be 300.005
three hundred ninety-one thousandths . . . 0.391four tenths . . . 0.4The sum of (three hundred ninety-one thousandths) + (four tenths) = 0.791
12.873 = twelve and eight hundred seventy-three thousandths.
Expressed in figures, this is equal to 3.852.
It is 0.4321
It is forty three and seven hundred twenty nine thousandths.
You cannot write it as it appears.