Step 1:
The first step to converting 20005.266635438 to a fraction is to re-write 20005.266635438 in the form p/q where p and q are both positive integers. To start with, 20005.266635438 can be written as simply 20005.266635438/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20005.266635438, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20005.266635438/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20005.266635438/1 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 20005.266635438 as a fraction:
80021/4 / 1