To reduce \(-\frac{3}{9}\) to \(-\frac{1}{3}\), she likely followed these steps:

1. **Identify the Greatest Common Divisor (GCD)**: The GCD of 3 and 9 is 3.
2. **Divide Both the Numerator and Denominator by the GCD**: 
   - Divide the numerator \(-3\) by 3, which gives \(-1\).
   - Divide the denominator 9 by 3, which gives 3.
3. **Simplify the Fraction**: The fraction \(-\frac{3}{9}\) simplifies to \(-\frac{1}{3}\).

Thus, \(-\frac{3}{9} = -\frac{1}{3}\).

Would you like more details or have any questions?

Here are 5 related questions:
1. How do you find the GCD of two numbers?
2. What is the process for simplifying fractions in general?
3. Can you simplify the fraction \( \frac{4}{8} \)?
4. Why does dividing the numerator and denominator by the same number simplify the fraction?
5. How do you simplify a fraction when the numerator or denominator is negative?

**Tip:** Always check if the numerator and denominator have a common factor when simplifying fractions.

Discover how to simplify the fraction -3/9 to -1/3 using the Greatest Common Divisor (GCD). This step-by-step guide covers essential fraction simplification concepts, making it ideal for students in Grades 5-7.

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