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Let's solve the problem by first simplifying the expression \(-\frac{15}{3}\).

\[
-\frac{15}{3} = -5
\]

Now we need to determine what type of number \(-5\) is by checking the options:

1. **Whole number**: Whole numbers are non-negative integers (0, 1, 2, ...). Since \(-5\) is negative, it is **not** a whole number.
2. **Integer**: Integers include all whole numbers and their negative counterparts (..., -3, -2, -1, 0, 1, 2, ...). Since \(-5\) is an integer, this option applies.
3. **Rational number**: Rational numbers are numbers that can be expressed as a fraction of two integers. Since \(-5\) can be written as \(-\frac{5}{1}\), it is a rational number.
4. **Irrational number**: Irrational numbers cannot be expressed as a fraction of two integers. Since \(-5\) is rational, it is **not** irrational.

### Correct answers:
- **B: Integer**
- **C: Rational**

Would you like further clarification on these concepts or any additional details?

Here are 5 related questions to explore further:
1. What is the difference between rational and irrational numbers?
2. Are all integers also rational numbers? Why or why not?
3. Can a negative number ever be a whole number?
4. How do you classify zero in terms of these number types?
5. What are examples of numbers that are irrational?

**Tip**: Remember, any integer is also a rational number because it can be expressed as a fraction where the denominator is 1.

What type of number is -15/3? Choose all answers that apply: A) Whole number B) Integer C) Rational D) Irrational.

Learn how to classify numbers like -15/3 by determining whether they are integers, rational, or irrational. This problem involves simplifying -15/3 to -5 and analyzing the type of number it represents. Suitable for Grades 6-8.

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