The percentage sign is used in mathematics to represent a fraction out of 100. Typically, it is used in an expression like this:
In plain language, this expression represents “fifteen-perecent” which is equivelant to the fraction and decimal value .
The symbol is also used in computing to represent the modulus operator. Typically, in this context the symbol is used in an expression like this:
4 % 3 = 1
In plain language, this expression means four mod three which is equal to one.
The modulus operator returns the remainder of dividing the first expression by the second expression.