Step 1:
The first step to converting 20339.128390372 to a fraction is to re-write 20339.128390372 in the form p/q where p and q are both positive integers. To start with, 20339.128390372 can be written as simply 20339.128390372/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20339.128390372, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20339.128390372/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20339.128390372/1 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 20339.128390372 as a fraction:
142374/7 / 1