Step 1:
The first step to converting 215998.63375169 to a fraction is to re-write 215998.63375169 in the form p/q where p and q are both positive integers. To start with, 215998.63375169 can be written as simply 215998.63375169/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 215998.63375169, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 215998.63375169/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 215998.63375169/1 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 215998.63375169 as a fraction:
431997/2 / 1