Step 1:
The first step to converting 684593.72286638 to a fraction is to re-write 684593.72286638 in the form p/q where p and q are both positive integers. To start with, 684593.72286638 can be written as simply 684593.72286638/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 684593.72286638, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 684593.72286638/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 684593.72286638/1 each by 100000000:
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 684593.72286638 as a fraction:
684594/1 / 1