Step 1:
The first step to converting 427131.63398436 to a fraction is to re-write 427131.63398436 in the form p/q where p and q are both positive integers. To start with, 427131.63398436 can be written as simply 427131.63398436/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 427131.63398436, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 427131.63398436/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 427131.63398436/1 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 427131.63398436 as a fraction:
427132/1 / 1