No, an irrational number by definition is a number that cannot be written as a fraction
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No. 4 over 4, or 1 whole, is not an irrational number. It can be written as a simple fraction, 4/4, so it is not an irrational number.
The square root of 3 is an irrational number
3 squared is 9 and 4 squared is 16, so the square root of any whole number between 9 and 16 will be irrational.
The square root of 9/16 is 3/4 which is a rational number
Rational: In mathematics, an irrational number is any real number which cannot be expressed as a fraction a/b, where a and b are integers. Therefore, by definition, 3 and 4 both being integers, 3/4 is rational.