9. Michael made of his free throws at
   practice. What is in simplest form?

To simplify , we need to find the greatest common divisor (GCD) of the numerator (9) and the denominator (12). The GCD of 9 and 12 is 3. By dividing both the numerator and denominator by this GCD, we get:

So, in simplest form is .

When it comes to simplifying fractions, one common mistake is forgetting to divide both the numerator and the denominator by the same number. This is crucial because if you only reduce one part, it can lead to an incorrect answer. Always check for the GCD to ensure your fraction is fully simplified!