Step 1:
The first step to converting 3945212.8125366 to a fraction is to re-write 3945212.8125366 in the form p/q where p and q are both positive integers. To start with, 3945212.8125366 can be written as simply 3945212.8125366/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 3945212.8125366, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 3945212.8125366/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 3945212.8125366/1 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 3945212.8125366 as a fraction:
3945212/1 / 1