Yes, 18 is a rational number. A rational number is any number that can be expressed as the ratio (or fraction) of two integers, where the denominator is not zero. In this case, 18 can be written as \( \frac{18}{1} \), which is a ratio of two integers. Therefore, 18 is indeed a rational number.

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Here are 5 related questions:
1. What is the difference between rational and irrational numbers?
2. Can a decimal number be rational? If so, how?
3. Is zero a rational number?
4. Are all whole numbers considered rational numbers?
5. How do you determine if a fraction is rational or irrational?

**Tip:** A number is rational if its decimal expansion either terminates or repeats in a pattern!

Discover why 18 is a rational number, with clear explanations and examples. Learn how 18 can be expressed as a fraction and what makes a number rational. Suitable for Grades 6-8.

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