Step 1:
The first step to converting 2020406.6400579 to a fraction is to re-write 2020406.6400579 in the form p/q where p and q are both positive integers. To start with, 2020406.6400579 can be written as simply 2020406.6400579/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 2020406.6400579, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 2020406.6400579/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 2020406.6400579/1 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 2020406.6400579 as a fraction:
2020406/1 / 1