Step 1:
The first step to converting 138636985.21456 to a fraction is to re-write 138636985.21456 in the form p/q where p and q are both positive integers. To start with, 138636985.21456 can be written as simply 138636985.21456/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 138636985.21456, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 138636985.21456/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 138636985.21456/1 each by 100000:
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 138636985.21456 as a fraction:
138636985/1 / 1