Step 1:
The first step to converting 81564.78025453 to a fraction is to re-write 81564.78025453 in the form p/q where p and q are both positive integers. To start with, 81564.78025453 can be written as simply 81564.78025453/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 81564.78025453, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 81564.78025453/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 81564.78025453/1 each by 100000000:
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 81564.78025453 as a fraction:
326259/4 / 1