Real numbers are defined as the set of rational numbers together with Irrational Numbers. So rationals are a subset of reals, by definition.
Every integer is also a rational number and a real number.
Infinitely rarely, a real number is also a rational number. (There are an infinite number of rational numbers, but there are a "much bigger infinity" of real numbers.)
It is a negative number. It is also a rational number; also, it's a real number.
Rational numbers are a proper subset of real numbers so all rational numbers are real numbers.
Numbers are split into real and imaginary. Rational numbers are under the category: Real. Therefore all rational numbers are real. An irrational number is also real, but can not be expressed as a fraction.
It IS a real number.It's also rational.
1.1616616661 is a real number, and it's also a rational number.
No, because it could be a rational number.
Yes, -28 is an integer because it is a whole number that can be positive or negative. It is also a rational number because it can be expressed as a fraction, in this case, -28/1. Since any rational number is also a real number, -28 is also a real number.
Yes.
Yes, it is.
A rational number cannot also be irrational. A real number is either rational, or it is irrational.