Step 1:
The first step to converting 217021.3645917 to a fraction is to re-write 217021.3645917 in the form p/q where p and q are both positive integers. To start with, 217021.3645917 can be written as simply 217021.3645917/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 217021.3645917, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 217021.3645917/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 217021.3645917/1 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 217021.3645917 as a fraction:
434043/2 / 1