Identify the number that does not belong with the other three. Explain your reasoning. negative 10 over 2, negative 13.4, square root 18, 22.7 repeating 7

Question

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3 of these are rational numbers , the other is irrational

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a rational number is a whole number ( positive or negative, or a number that can be written as a fraction

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an example of an irrational number is  square root of 10

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- 13.4 is a rational number because it can be written as -13 4/10  or -134/10

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the decimal part is really a fraction  eg 0.3 = 3/10