Step 1:
The first step to converting 648539.9691574 to a fraction is to re-write 648539.9691574 in the form p/q where p and q are both positive integers. To start with, 648539.9691574 can be written as simply 648539.9691574/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 648539.9691574, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 648539.9691574/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 648539.9691574/1 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 648539.9691574 as a fraction:
648540/1 / 1