Step 1:
The first step to converting 398494210.35366 to a fraction is to re-write 398494210.35366 in the form p/q where p and q are both positive integers. To start with, 398494210.35366 can be written as simply 398494210.35366/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 398494210.35366, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 398494210.35366/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 398494210.35366/1 each by 100000:
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 398494210.35366 as a fraction:
398494210/1 / 1