Yes.
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4 is a rational number. Any number is rational as long as it can be put into a fraction or ratio. In other words, 4 is a rational number because if you want to express 4 as a fraction, you would just put it over 1; 4 is the numerator, and 1 is the denominator in this case.
The rational number -4 can be expressed as -4/1 or -8/2 or -12/3, and so on.
-4/1
-4 is a rational number because it can be expressed as an improper fraction in the form of -4/1
.4/.8 is the same as 1/2 which is a rational number