Step 1:
The first step to converting 168121.42953131 to a fraction is to re-write 168121.42953131 in the form p/q where p and q are both positive integers. To start with, 168121.42953131 can be written as simply 168121.42953131/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 168121.42953131, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 168121.42953131/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 168121.42953131/1 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 168121.42953131 as a fraction:
336243/2 / 1