Step 1:
The first step to converting 821768406.0309 to a fraction is to re-write 821768406.0309 in the form p/q where p and q are both positive integers. To start with, 821768406.0309 can be written as simply 821768406.0309/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 821768406.0309, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 821768406.0309/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 821768406.0309/1 each by 10000:
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 821768406.0309 as a fraction:
821768406/1 / 1