Step 1:
The first step to converting 315392.57455578 to a fraction is to re-write 315392.57455578 in the form p/q where p and q are both positive integers. To start with, 315392.57455578 can be written as simply 315392.57455578/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 315392.57455578, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 315392.57455578/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 315392.57455578/1 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 315392.57455578 as a fraction:
630785/2 / 1