Step 1:
The first step to converting 20556.715405394 to a fraction is to re-write 20556.715405394 in the form p/q where p and q are both positive integers. To start with, 20556.715405394 can be written as simply 20556.715405394/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20556.715405394, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20556.715405394/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20556.715405394/1 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 20556.715405394 as a fraction:
143897/7 / 1