Step 1:
The first step to converting 86878.500139623 to a fraction is to re-write 86878.500139623 in the form p/q where p and q are both positive integers. To start with, 86878.500139623 can be written as simply 86878.500139623/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 86878.500139623, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 86878.500139623/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 86878.500139623/1 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 86878.500139623 as a fraction:
173757/2 / 1