Step 1:
The first step to converting 20847.512987109 to a fraction is to re-write 20847.512987109 in the form p/q where p and q are both positive integers. To start with, 20847.512987109 can be written as simply 20847.512987109/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 20847.512987109, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 20847.512987109/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 20847.512987109/1 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 20847.512987109 as a fraction:
41695/2 / 1