Step 1:
The first step to converting 257984505.40009 to a fraction is to re-write 257984505.40009 in the form p/q where p and q are both positive integers. To start with, 257984505.40009 can be written as simply 257984505.40009/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 257984505.40009, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 257984505.40009/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 257984505.40009/1 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 257984505.40009 as a fraction:
257984505/1 / 1