Step 1:
The first step to converting 665123.2869478 to a fraction is to re-write 665123.2869478 in the form p/q where p and q are both positive integers. To start with, 665123.2869478 can be written as simply 665123.2869478/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 665123.2869478, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 665123.2869478/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 665123.2869478/1 each by 10000000:
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 665123.2869478 as a fraction:
665123/1 / 1