Step 1:
The first step to converting 389345.43999578 to a fraction is to re-write 389345.43999578 in the form p/q where p and q are both positive integers. To start with, 389345.43999578 can be written as simply 389345.43999578/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 389345.43999578, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 389345.43999578/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 389345.43999578/1 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 389345.43999578 as a fraction:
778691/2 / 1