Arithmetic/Reading Decimal Numerals

The word and is used only for the decimal point; And is also used to separate a whole number and a fraction. A comma is used at every third place, starting at the decimal point and moving left. Frequently a comma or space is used at every third place moving to the right of the decimal point.

Additionally, no comma is used before and. Also, all decimals end in ths except unitary decimals that end in th.

Alternatively, you may say the whole number, followed by a point and the digits of the decimals from leftmost to right. This is a much more natural and informal way of saying numbers.

Decimal numeral	Reading thereof	Alternative
$2,697,787.84$	Two million, six hundred ninety-seven thousand, seven hundred eighty-seven and eighty-four hundredths	Two million, six hundred ninety-seven thousand, seven hundred eighty-seven point eight four
$2,009$	Two thousand, nine
$1,987$	One thousand, nine hundred eighty-seven
$0.684$	Six hundred eighty-four thousandths	Zero point six eight four
$17.04$	Seventeen and four hundredths	Seventeen point zero four
$0.1$	One tenth	Zero point one
$4.3$	Four and three tenths	Four point three
$0.0001$	one ten-thousandth	Zero point zero zero zero one
$5.000008$	five and eight millionths	Five point zero zero zero zero zero eight
$0.00073$	seventy-three hundred-thousandths	Zero point zero zero zero seven three