Answer: Real number, Rational number.
Explanation:
To solve this exercise you must know the following definitions:
1. A Rational number is a number that you can write as a fraction, whose numerator and denominator are integers.
2. By definition, the Real numbers contain Natural numbers, Whole numbers, Integers, Rational numbers and Irrational numbers.
3. Then, the number 2.55 can be written as a fraction:
, therefore, it is a Real number and a Rational Number.