Answer:
2/3 * 3 = 2
Explanation:
We see that one model has 3 parts and 2 of the 3 parts are shaded. Thus, the fraction for one of the models by itself is 2/3, where 2 is the part shaded, and 3 is the whole (shaded parts + non-shaded parts).
Since we have three models with the same form and the same part shaded, we can simply multiply 2/3 by 3, which is our multiplication expression and solve:
2/3 * 3 = 6/3 = 2