Define rational number: Step 1: Define a rational number.A rational number can be expressed as a fraction where both the numerator and the denominator are integers, and the denominator is not zero.
Express as fraction: Step 2: Express 31 as a fraction.31 is already in the form of a fraction where 1 is the numerator and 3 is the denominator.
Check criteria: Step 3: Check if the fraction form fits the definition of a rational number.Since both 1 and 3 are integers, and 3 is not zero, 31 meets the criteria of a rational number.
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