Step 1:
The first step to converting 483.9987549539 to a fraction is to re-write 483.9987549539 in the form p/q where p and q are both positive integers. To start with, 483.9987549539 can be written as simply 483.9987549539/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 483.9987549539, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 483.9987549539/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 483.9987549539/1 each by 10000000000:
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 483.9987549539 as a fraction:
388651/803 / 1