Step 1:
The first step to converting 11439.874869402 to a fraction is to re-write 11439.874869402 in the form p/q where p and q are both positive integers. To start with, 11439.874869402 can be written as simply 11439.874869402/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 11439.874869402, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 11439.874869402/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 11439.874869402/1 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 11439.874869402 as a fraction:
91519/8 / 1