Step 1:
The first step to converting 6638645998.1432 to a fraction is to re-write 6638645998.1432 in the form p/q where p and q are both positive integers. To start with, 6638645998.1432 can be written as simply 6638645998.1432/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 6638645998.1432, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 6638645998.1432/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 6638645998.1432/1 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 6638645998.1432 as a fraction:
6638645998/1 / 1