Sam wants to shade 2/3 of the figure. He has already shaded 4 squares. How many more squares must he shade?

If you would like to know how many more squares must Sam shade, you can calculate this using the following steps:

2/3 of the whole figure is x squares

2/3 of 12 squares = x

2/3 * 12 = x

x = 8 squares

8 squares - 4 squares = 4 squares

Sam must shade 4 more squares.