To solve the multiplication of two fractions:

\[
\frac{-9}{10} \times \frac{25}{33}
\]

Multiply the numerators and the denominators:

\[
\frac{-9 \times 25}{10 \times 33} = \frac{-225}{330}
\]

Now simplify the fraction by finding the greatest common divisor (GCD) of 225 and 330, which is 15.

\[
\frac{-225 \div 15}{330 \div 15} = \frac{-15}{22}
\]

So, the result is:

\[
\frac{-15}{22}
\]

Would you like a more detailed explanation or have any questions?

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Here are 5 related questions to expand on this concept:
1. How do you multiply and divide fractions?
2. How do you simplify fractions?
3. What are some examples of multiplying negative fractions?
4. How do you find the greatest common divisor (GCD) of two numbers?
5. How does multiplication of negative numbers work in fractions?

**Tip:** Always check if a fraction can be simplified by finding the greatest common divisor (GCD) of the numerator and denominator.

Learn how to multiply fractions with negative numbers using -9/10 and 25/33. This step-by-step solution involves multiplying numerators and denominators, then simplifying using the GCD. Suitable for students in Grades 6-8.

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