To express the number 48 as a fraction in its simplest form, we can write it as:
48 can be expressed as 48/1.
Now, we need to check if this fraction can be simplified further. The number 48 is divisible by 1, and since 1 is the only integer that can divide all whole numbers without changing their value, this fraction is already in its simplest form.
Therefore, the simplest form of 48 as a fraction is:
48/1