As a ratio of two integers in the form p/q where q > 0.
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A rational number is a number that can be represented as a fraction: numerator/denominator. 1/10 = 0.1, so 0.1 is a rational number.
The number 0.444444 is a rational number. It is equivalent to 111111/250000, which, by definition of rational numbers, is rational. The number 0.444... (repeating) is also rational because it can be represented by the fraction 4/9. The number 0.444444 is a rational number because a rational number is a nnumber that can be expressed in the form of a fraction.
A number that can be represented as a fraction. Such as -4 is the same as -4/1.
The number .2020020002... is a rational number. A rational number is any number that can be expressed as a fraction of two integers. In this case, the number can be represented as 202/999, which is a ratio of two integers. Therefore, .2020020002... is a rational number.
There are a lot of them (actually an infinite amount). A rational number is a number which can be represented as a fraction (ratio) of two integers {non-zero denominator}. So 12.11 is a rational number, because it can be represented as 1211/100. It is greater than 12.1 and less than 12.2 so it is between them.