Step 1:
The first step to converting 20166.436439448 to a fraction is to re-write 20166.436439448 in the form p/q where p and q are both positive integers. To start with, 20166.436439448 can be written as simply 20166.436439448/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20166.436439448, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20166.436439448/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20166.436439448/1 each by 1000000000:
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 20166.436439448 as a fraction:
141165/7 / 1