Step 1:
The first step to converting 1038.6391406156 to a fraction is to re-write 1038.6391406156 in the form p/q where p and q are both positive integers. To start with, 1038.6391406156 can be written as simply 1038.6391406156/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1038.6391406156, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1038.6391406156/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1038.6391406156/1 each by 10000000000:
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 1038.6391406156 as a fraction:
25966/25 / 1