Step 1:
The first step to converting 85289.8710217 to a fraction is to re-write 85289.8710217 in the form p/q where p and q are both positive integers. To start with, 85289.8710217 can be written as simply 85289.8710217/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 85289.8710217, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 85289.8710217/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 85289.8710217/1 each by 10000000:
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 85289.8710217 as a fraction:
597029/7 / 1