Step 1:
The first step to converting 10220.128039878 to a fraction is to re-write 10220.128039878 in the form p/q where p and q are both positive integers. To start with, 10220.128039878 can be written as simply 10220.128039878/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 10220.128039878, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 10220.128039878/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 10220.128039878/1 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 10220.128039878 as a fraction:
81761/8 / 1