543 and there is no need to add a decimal point after the number.
.043
One hundred forty three 143. (notice the decimal point after the three)
0.349
It is 300.047
Three hundred forty-two thousands in decimal form is 342,000
.349
0.143
7043.742
With zeroes after the decimal point, the numeral is simply "forty thousand three hundred". As a dollar amount, it is "forty thousand three hundred dollars and no cents".
Forty five thousand, three hundred assuming decimal is at the end.
0.341
It is forty seven thousand three hundred eighty five hundred thousandths.