Step 1:
The first step to converting 19982.431253888 to a fraction is to re-write 19982.431253888 in the form p/q where p and q are both positive integers. To start with, 19982.431253888 can be written as simply 19982.431253888/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 19982.431253888, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 19982.431253888/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 19982.431253888/1 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 19982.431253888 as a fraction:
139877/7 / 1