Step 1:
The first step to converting 85216.217232428 to a fraction is to re-write 85216.217232428 in the form p/q where p and q are both positive integers. To start with, 85216.217232428 can be written as simply 85216.217232428/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 85216.217232428, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 85216.217232428/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 85216.217232428/1 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 85216.217232428 as a fraction:
340865/4 / 1