Step 1:
The first step to converting 746.6403398001 to a fraction is to re-write 746.6403398001 in the form p/q where p and q are both positive integers. To start with, 746.6403398001 can be written as simply 746.6403398001/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 746.6403398001, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 746.6403398001/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 746.6403398001/1 each by 10000000000:
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 746.6403398001 as a fraction:
18666/25 / 1