Step 1:
The first step to converting 722400.643422 to a fraction is to re-write 722400.643422 in the form p/q where p and q are both positive integers. To start with, 722400.643422 can be written as simply 722400.643422/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 722400.643422, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 722400.643422/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 722400.643422/1 each by 1000000:
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 722400.643422 as a fraction:
722400/1 / 1