Step 1:
The first step to converting 78659.7904799 to a fraction is to re-write 78659.7904799 in the form p/q where p and q are both positive integers. To start with, 78659.7904799 can be written as simply 78659.7904799/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 78659.7904799, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 78659.7904799/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 78659.7904799/1 each by 10000000:
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 78659.7904799 as a fraction:
314639/4 / 1