Step 1:
The first step to converting 125917.20421042 to a fraction is to re-write 125917.20421042 in the form p/q where p and q are both positive integers. To start with, 125917.20421042 can be written as simply 125917.20421042/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 125917.20421042, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 125917.20421042/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 125917.20421042/1 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 125917.20421042 as a fraction:
503669/4 / 1