How can I identify rational numbers?

What are rational numbers and how can I identify them?

Rational numbers are numbers that can be expressed as a fraction of two integers. To identify them, check if they can be written in the form a/b, where a and b are integers and b is not zero.

Can you give me some examples of rational numbers?

Sure! Examples of rational numbers include 1/2, -3, 0.75, and 4. Rational numbers can be positive, negative, or zero.

What about numbers like pi or the square root of 2?

Those are not rational numbers. Pi and the square root of 2 cannot be expressed as a fraction of two integers.

How can I tell if a decimal is rational?

If a decimal is terminating (like 0.5) or repeating (like 0.333...), it is rational. Non-repeating, non-terminating decimals are not rational.