Step 1:
The first step to converting 390630.57308455 to a fraction is to re-write 390630.57308455 in the form p/q where p and q are both positive integers. To start with, 390630.57308455 can be written as simply 390630.57308455/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 390630.57308455, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 390630.57308455/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 390630.57308455/1 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 390630.57308455 as a fraction:
781261/2 / 1