12% of 275 help me with this pl

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

Is a positive integer raised to a negative power always positive