Step 1:
The first step to converting 109389.78887775 to a fraction is to re-write 109389.78887775 in the form p/q where p and q are both positive integers. To start with, 109389.78887775 can be written as simply 109389.78887775/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 109389.78887775, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 109389.78887775/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 109389.78887775/1 each by 100000000:
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 109389.78887775 as a fraction:
437559/4 / 1