Step 1:
The first step to converting 33.172688398437 to a fraction is to re-write 33.172688398437 in the form p/q where p and q are both positive integers. To start with, 33.172688398437 can be written as simply 33.172688398437/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 33.172688398437, which in this case is 12. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 33.172688398437/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 33.172688398437/1 each by 1000000000000:
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 33.172688398437 as a fraction:
4611/139 / 1