Step 1:
The first step to converting 6643149.665975 to a fraction is to re-write 6643149.665975 in the form p/q where p and q are both positive integers. To start with, 6643149.665975 can be written as simply 6643149.665975/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 6643149.665975, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 6643149.665975/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 6643149.665975/1 each by 1000000:
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 6643149.665975 as a fraction:
6643149/1 / 1