Before we answer that the question that every rational number is a whole number. True or False give reason, lets quickly understand in short about rational numbers.
What is a rational number?
A rational number is a number that can be expressed in the form of x/y, where y must not be 0. (x and y being integer)
With this logic lets see some examples
Example 1: The Number 5 can also be expressed as 5/1
Therefore, 5 is a rational number as well as a whole number as 5/1 =5
Example 2: Number 2.5 can be expressed as 5/2
So in this case 2.5 is a rational number because it can be expressed as 5/2 ( x/y). But it is not a whole number as it is in decimals.
Therefore, a rational number may or may not be a whole number but every whole number will be a rational number.
So the Answer to the question that Every rational number is a whole number is true or false is False.