Step 1:
The first step to converting 19938.556838886 to a fraction is to re-write 19938.556838886 in the form p/q where p and q are both positive integers. To start with, 19938.556838886 can be written as simply 19938.556838886/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19938.556838886, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19938.556838886/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19938.556838886/1 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 19938.556838886 as a fraction:
139570/7 / 1