Step 1:
The first step to converting 512439.003813 to a fraction is to re-write 512439.003813 in the form p/q where p and q are both positive integers. To start with, 512439.003813 can be written as simply 512439.003813/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 512439.003813, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 512439.003813/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 512439.003813/1 each by 1000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 512439.003813 as a fraction:
512439/1 / 1