Step 1:
The first step to converting 172372.12085001 to a fraction is to re-write 172372.12085001 in the form p/q where p and q are both positive integers. To start with, 172372.12085001 can be written as simply 172372.12085001/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 172372.12085001, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 172372.12085001/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 172372.12085001/1 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 172372.12085001 as a fraction:
172372/1 / 1