Step 1:
The first step to converting 12858470.821321 to a fraction is to re-write 12858470.821321 in the form p/q where p and q are both positive integers. To start with, 12858470.821321 can be written as simply 12858470.821321/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 12858470.821321, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 12858470.821321/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 12858470.821321/1 each by 1000000:
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 12858470.821321 as a fraction:
12858470/1 / 1