Step 1:
The first step to converting 870344.5123281 to a fraction is to re-write 870344.5123281 in the form p/q where p and q are both positive integers. To start with, 870344.5123281 can be written as simply 870344.5123281/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 870344.5123281, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 870344.5123281/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 870344.5123281/1 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 870344.5123281 as a fraction:
870344/1 / 1