Step 1:
The first step to converting 636171.25668426 to a fraction is to re-write 636171.25668426 in the form p/q where p and q are both positive integers. To start with, 636171.25668426 can be written as simply 636171.25668426/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 636171.25668426, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 636171.25668426/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 636171.25668426/1 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 636171.25668426 as a fraction:
636171/1 / 1