Step 1:
The first step to converting 78699.971286608 to a fraction is to re-write 78699.971286608 in the form p/q where p and q are both positive integers. To start with, 78699.971286608 can be written as simply 78699.971286608/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 78699.971286608, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 78699.971286608/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 78699.971286608/1 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 78699.971286608 as a fraction:
78700/1 / 1