Step 1:
The first step to converting 121242.89891966 to a fraction is to re-write 121242.89891966 in the form p/q where p and q are both positive integers. To start with, 121242.89891966 can be written as simply 121242.89891966/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 121242.89891966, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 121242.89891966/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 121242.89891966/1 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 121242.89891966 as a fraction:
121243/1 / 1