Step 1:
The first step to converting 644554872.47988 to a fraction is to re-write 644554872.47988 in the form p/q where p and q are both positive integers. To start with, 644554872.47988 can be written as simply 644554872.47988/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 644554872.47988, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 644554872.47988/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 644554872.47988/1 each by 100000:
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 644554872.47988 as a fraction:
644554872/1 / 1