# Question: Is A Rational Number?

## Is negative 3 a rational number?

−3 is negative so it is not a natural or whole number.

Rational numbers are numbers that can be expressed as a fraction or ratio of two integers.

Rational numbers are denoted Q .

Since −3 can be written as −31 , it could be argued that −3 is also a real number..

## Is the number 0 a rational number?

Zero Is a Rational Number As such, if the numerator is zero (0), and the denominator is any non-zero integer, the resulting quotient is itself zero.

## What qualifies as a rational number?

In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.

## How do you know if a number is rational or irrational?

An irrational number is a number that cannot be written as the ratio of two integers. Its decimal form does not stop and does not repeat. Let’s summarize a method we can use to determine whether a number is rational or irrational. stops or repeats, the number is rational.

## Is 2/3 an irrational number?

For example 3=3/1, −17, and 2/3 are rational numbers. … Most real numbers (points on the number-line) are irrational (not rational). The rational numbers are those which have repeating decimal expansions (for example 1/11=0.09090909…, and 1=1.000000…

## Is 21 rational or irrational?

Answer and Explanation: The number 21 is a rational number. It is an integer, or whole number, and all integers are rational numbers.