Step 1:
The first step to converting 278658.56631074 to a fraction is to re-write 278658.56631074 in the form p/q where p and q are both positive integers. To start with, 278658.56631074 can be written as simply 278658.56631074/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 278658.56631074, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 278658.56631074/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 278658.56631074/1 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 278658.56631074 as a fraction:
557317/2 / 1