Step 1:
The first step to converting 20447.366115456 to a fraction is to re-write 20447.366115456 in the form p/q where p and q are both positive integers. To start with, 20447.366115456 can be written as simply 20447.366115456/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20447.366115456, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20447.366115456/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20447.366115456/1 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 20447.366115456 as a fraction:
163579/8 / 1