Step 1:
The first step to converting 641677511.9882 to a fraction is to re-write 641677511.9882 in the form p/q where p and q are both positive integers. To start with, 641677511.9882 can be written as simply 641677511.9882/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 641677511.9882, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 641677511.9882/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 641677511.9882/1 each by 10000:
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 641677511.9882 as a fraction:
641677511/1 / 1