Step 1:
The first step to converting 7720.9875418528 to a fraction is to re-write 7720.9875418528 in the form p/q where p and q are both positive integers. To start with, 7720.9875418528 can be written as simply 7720.9875418528/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 7720.9875418528, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 7720.9875418528/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 7720.9875418528/1 each by 10000000000:
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 7720.9875418528 as a fraction:
617679/80 / 1