Step 1:
The first step to converting 42089.518930164 to a fraction is to re-write 42089.518930164 in the form p/q where p and q are both positive integers. To start with, 42089.518930164 can be written as simply 42089.518930164/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 42089.518930164, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 42089.518930164/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 42089.518930164/1 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 42089.518930164 as a fraction:
84179/2 / 1