100 as a percent is simply 100%. When you have a whole number like 100, it represents 100 out of 100, which is equivalent to 100%. This means that 100 is the entire quantity or the whole, and it is represented as 100% in percentage terms.
Percentages are used to express how large or small one quantity is relative to another. In this case, since 100 is the whole, it is 100% of itself. There is no need for any conversion or calculation because 100 is already in its percentage form.