Step 1:
The first step to converting 726.78321375369 to a fraction is to re-write 726.78321375369 in the form p/q where p and q are both positive integers. To start with, 726.78321375369 can be written as simply 726.78321375369/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 726.78321375369, which in this case is 11. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 726.78321375369/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 726.78321375369/1 each by 100000000000:
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 726.78321375369 as a fraction:
16716/23 / 1