Step 1:
The first step to converting 126404.5137421 to a fraction is to re-write 126404.5137421 in the form p/q where p and q are both positive integers. To start with, 126404.5137421 can be written as simply 126404.5137421/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 126404.5137421, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 126404.5137421/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 126404.5137421/1 each by 10000000:
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 126404.5137421 as a fraction:
252809/2 / 1