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Simplify the fraction. If the fraction is already simplified, so state.

Let's simplify the given fraction, \( \frac{12}{15} \):

1. Find the greatest common divisor (GCD) of the numerator (12) and the denominator (15). 
   - The factors of 12 are: 1, 2, 3, 4, 6, 12.
   - The factors of 15 are: 1, 3, 5, 15.
   - The GCD of 12 and 15 is 3.

2. Divide both the numerator and denominator by 3:
   \[
   \frac{12 \div 3}{15 \div 3} = \frac{4}{5}
   \]

Thus, \( \frac{12}{15} \) simplifies to \( \frac{4}{5} \).

The correct answer is the third option: \( \frac{4}{5} \).

Would you like further details or have any questions?

Here are some related questions for further practice:
1. Simplify \( \frac{18}{27} \).
2. Simplify \( \frac{8}{20} \).
3. Simplify \( \frac{36}{48} \).
4. Is \( \frac{7}{13} \) already in its simplest form?
5. Simplify \( \frac{25}{35} \).

**Tip:** To simplify fractions, always look for the greatest common divisor of the numerator and the denominator!

Learn how to simplify the fraction 12/15 step-by-step. This problem covers essential math concepts such as finding the greatest common divisor and using it to reduce fractions. Suitable for students in Grades 5-7.

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