Step 1:
The first step to converting 685190.1550663 to a fraction is to re-write 685190.1550663 in the form p/q where p and q are both positive integers. To start with, 685190.1550663 can be written as simply 685190.1550663/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 685190.1550663, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 685190.1550663/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 685190.1550663/1 each by 10000000:
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 685190.1550663 as a fraction:
685190/1 / 1