Step 1:
The first step to converting 10188.116621209 to a fraction is to re-write 10188.116621209 in the form p/q where p and q are both positive integers. To start with, 10188.116621209 can be written as simply 10188.116621209/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 10188.116621209, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 10188.116621209/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 10188.116621209/1 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 10188.116621209 as a fraction:
81505/8 / 1