Step 1:
The first step to converting 85668.564416844 to a fraction is to re-write 85668.564416844 in the form p/q where p and q are both positive integers. To start with, 85668.564416844 can be written as simply 85668.564416844/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 85668.564416844, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 85668.564416844/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 85668.564416844/1 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 85668.564416844 as a fraction:
171337/2 / 1