Step 1:
The first step to converting 688285008.4578 to a fraction is to re-write 688285008.4578 in the form p/q where p and q are both positive integers. To start with, 688285008.4578 can be written as simply 688285008.4578/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 688285008.4578, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 688285008.4578/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 688285008.4578/1 each by 10000:
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 688285008.4578 as a fraction:
688285008/1 / 1