First, you want to write 725 as the numerator of the fraction because that is what the number reads after the decimal point. For the denominator of the fraction, we will put 1,000 because there are 3 numbers that appear after the decimal point so we can put 3 zeroes and put a 1 in front of it.
The fraction 725/1000 is not in lowest terms.We can divide both the numerator and the denominator by 5 and we will get 145/200.
The fraction can still be reduced so we can divide both the numerator and the denominator by 5 again and we will get our simplified fraction which is 29/40.