Step 1:
The first step to converting 63986.87851071 to a fraction is to re-write 63986.87851071 in the form p/q where p and q are both positive integers. To start with, 63986.87851071 can be written as simply 63986.87851071/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 63986.87851071, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 63986.87851071/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 63986.87851071/1 each by 100000000:
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 63986.87851071 as a fraction:
511895/8 / 1