A rational number is one that can be expressed as ratio(or fraction) of two integers: given integers a & b (with b ≠ 0), then the fraction a / b (or a ÷ b) will be a rational number. We need to specify that b not equal to zero, as division by zero is not defined (well not for most math applications).
So Irrational Numbers such as pi, e, and square root of 2: cannot in any way be resolved into a fraction of two integers. All rational numbers can. Examples are:
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All whole numbers and fractions are rational numbers because irrational numbers can't be expressed as whole numbers or fractions.
Any already rational number
An irrational number is a number that has no definite end. 4.5 has a definite end. THis makes it a rational number.
88 is the ratio of 88 and 1. That makes it rational.
Yes. It's the ratio of -144 and 4. That makes it a rational number by definition.
All numbers can make a square. Every real number makes a positive real square. Every rational number makes a rational square. Every integer makes a perfect square.