Step 1:
The first step to converting 641632.9392679 to a fraction is to re-write 641632.9392679 in the form p/q where p and q are both positive integers. To start with, 641632.9392679 can be written as simply 641632.9392679/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 641632.9392679, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 641632.9392679/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 641632.9392679/1 each by 10000000:
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 641632.9392679 as a fraction:
641633/1 / 1