Step 1:
The first step to converting 2720.648828381 to a fraction is to re-write 2720.648828381 in the form p/q where p and q are both positive integers. To start with, 2720.648828381 can be written as simply 2720.648828381/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 2720.648828381, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 2720.648828381/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 2720.648828381/1 each by 1000000000:
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 2720.648828381 as a fraction:
46251/17 / 1