Step 1:
The first step to converting 63721.515725806 to a fraction is to re-write 63721.515725806 in the form p/q where p and q are both positive integers. To start with, 63721.515725806 can be written as simply 63721.515725806/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 63721.515725806, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 63721.515725806/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 63721.515725806/1 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 63721.515725806 as a fraction:
127443/2 / 1