Multiply the numerator and denominator by any non-zero number.
So if n and d are both non integers (with d not equal zero), then n/d is a rational number, and
if x is any non-zero number
then (x*n) / (x*d) is equivalent to n/d.
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Divide the numerator of the rational number by its denominator. The quotient is the decimal equivalent.
The number 0.444444 is a rational number. It is equivalent to 111111/250000, which, by definition of rational numbers, is rational. The number 0.444... (repeating) is also rational because it can be represented by the fraction 4/9. The number 0.444444 is a rational number because a rational number is a nnumber that can be expressed in the form of a fraction.
34/99
The number can be expressed as the rational fraction: 3/1. You can then calculate equivalent rational fractions if you multiply both, its numerator and denominator, by any non-zero integer.
By demonstrating that it is equivalent to the ratio: 57/100. Any number that can be expressed as the ratio of two integers, the denominator not equal to zero, is rational.