To express the number 27 as a fraction in its simplest form, we can represent it as 27/1. This is because any whole number can be written as a fraction by placing it over 1.
Next, we check if this fraction can be simplified further. Since 27 is a whole number and 1 is the smallest integer greater than 0, there are no common factors other than 1. Therefore, 27/1 is indeed in its simplest form.
In conclusion, the simplest form of the fraction for 27 is 27/1.