Step 1:
The first step to converting 574.28398108515 to a fraction is to re-write 574.28398108515 in the form p/q where p and q are both positive integers. To start with, 574.28398108515 can be written as simply 574.28398108515/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 574.28398108515, which in this case is 11. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 574.28398108515/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 574.28398108515/1 each by 100000000000:
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 574.28398108515 as a fraction:
46517/81 / 1