Venn Diagram - Number System:

The expression is .

                    (Divide: )

Observe that the decimal (0.416666) of the number is repeating.

The number is a rational number.

Obeserve the vendiagram:

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• The number is not a Natural number (N),
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           not a Whole number (W), and not an   Integer (Z).

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• The number is a rational number (Q).         
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• All rational numbers (Q) are real numbers (R).
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The number belongs to Q and R.