Step 1:
The first step to converting 638411.24997376 to a fraction is to re-write 638411.24997376 in the form p/q where p and q are both positive integers. To start with, 638411.24997376 can be written as simply 638411.24997376/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 638411.24997376, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 638411.24997376/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 638411.24997376/1 each by 100000000:
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 638411.24997376 as a fraction:
638411/1 / 1