Step 1:
The first step to converting 78776.478103976 to a fraction is to re-write 78776.478103976 in the form p/q where p and q are both positive integers. To start with, 78776.478103976 can be written as simply 78776.478103976/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 78776.478103976, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 78776.478103976/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 78776.478103976/1 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 78776.478103976 as a fraction:
157553/2 / 1