Step 1:
The first step to converting 399530.1623459 to a fraction is to re-write 399530.1623459 in the form p/q where p and q are both positive integers. To start with, 399530.1623459 can be written as simply 399530.1623459/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 399530.1623459, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 399530.1623459/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 399530.1623459/1 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 399530.1623459 as a fraction:
399530/1 / 1