Step 1:
The first step to converting 31579.487540636 to a fraction is to re-write 31579.487540636 in the form p/q where p and q are both positive integers. To start with, 31579.487540636 can be written as simply 31579.487540636/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 31579.487540636, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 31579.487540636/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 31579.487540636/1 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 31579.487540636 as a fraction:
63159/2 / 1