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It is rational. An irrational number is a number that you cannot define by a fraction or a decimal. Since you wrote it as a decimal, it is rational. The fact that it is negative does not matter.

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-2.75 is the ratio of 275 to -100, or of -275 to 100 ... nice and rational.

Q: Is -2.75 an irrational or rational number?

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It is a rational number

It is a rational number.

If an irrational number is added to, (or multiplied by) a rational number, the result will always be an irrational number.

When a rational numbers is divided by an irrational number, the answer is irrational for every non-zero rational number.

Can be irrational or rational.1 [rational] * sqrt(2) [irrational] = sqrt(2) [irrational]0 [rational] * sqrt(2) [irrational] = 0 [rational]

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it is a rational number but 4.121314..... is an irrational no

Irrational.

Such a product is always irrational - unless the rational number happens to be zero.

The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.

No number is irrational and rational.

If an irrational number is added to, (or multiplied by) a rational number, the result will always be an irrational number.

The sum of a rational and irrational number must be an irrational number.