The problem asks to shade 3/4 of the given shape, which is a grid with 12 cells in total (3 rows and 4 columns).

To calculate 3/4 of 12: $\frac{3}{4} \times 12 = 9$

So, 9 out of the 12 cells should be shaded. From the image, it looks like you have correctly shaded 9 cells.

Would you like more details, or do you have any questions about this?

Here are some related questions:

1. What is 1/4 of 12?
2. How would you shade 2/3 of a grid with 9 cells?
3. How do you calculate a fraction of a total number of items?
4. How could this problem be visualized with different shapes?
5. What is 5/6 of a shape with 18 squares?

Tip: To calculate a fraction of a number, multiply the fraction by the total number.