3.007 as a fraction is equal to 3 7/1000.
The three is to the left of the decimal point so it is a whole number, which makes the fraction a mixed number.
The 7 is three places to the right of the decimal point, which when multiplying 10^3 will result in 1,000. Therefore, the denominator is 1,000.
3.007 as a fraction is 3 7/1000.
