Step 1:
The first step to converting 1636.6396671795 to a fraction is to re-write 1636.6396671795 in the form p/q where p and q are both positive integers. To start with, 1636.6396671795 can be written as simply 1636.6396671795/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1636.6396671795, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1636.6396671795/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1636.6396671795/1 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 1636.6396671795 as a fraction:
40916/25 / 1