Step 1:
The first step to converting 4199.9903735815 to a fraction is to re-write 4199.9903735815 in the form p/q where p and q are both positive integers. To start with, 4199.9903735815 can be written as simply 4199.9903735815/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 4199.9903735815, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 4199.9903735815/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 4199.9903735815/1 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 4199.9903735815 as a fraction:
432599/103 / 1