Step 1:
The first step to converting 389379.3980778 to a fraction is to re-write 389379.3980778 in the form p/q where p and q are both positive integers. To start with, 389379.3980778 can be written as simply 389379.3980778/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 389379.3980778, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 389379.3980778/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 389379.3980778/1 each by 10000000:
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 389379.3980778 as a fraction:
778759/2 / 1