Step 1:
The first step to converting 20994.744638413 to a fraction is to re-write 20994.744638413 in the form p/q where p and q are both positive integers. To start with, 20994.744638413 can be written as simply 20994.744638413/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20994.744638413, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20994.744638413/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20994.744638413/1 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 20994.744638413 as a fraction:
83979/4 / 1