The decimal representation for "three and thirty-four hundredths" is 3.34.
Three and forty-four hundredths in decimal form is 3.44
Three and seventy-four hundredths in decimal form is 3.74
The decimal number of seven and four tenths and three hundredths is 7.43
I take it you mean five hundred and four, and three hundredths... Which is 504.03.
4.03
3.04
3.74
3.74
24.03
3.74
4.03