Step 1:
The first step to converting 84678.7876396 to a fraction is to re-write 84678.7876396 in the form p/q where p and q are both positive integers. To start with, 84678.7876396 can be written as simply 84678.7876396/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 84678.7876396, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 84678.7876396/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 84678.7876396/1 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 84678.7876396 as a fraction:
338715/4 / 1