Question

which model shows 40%?

Explanation:

Step1: Calculate percentage of first model

Total blocks = 9, shaded = 5. Percentage = $\frac{5}{9} \approx 55.56\%$

Step2: Calculate percentage of second model

Total blocks = 10, shaded = 4. Percentage = $\frac{4}{10} = 40\%$

Step3: Calculate percentage of third model

Total blocks = 8, shaded = 4. Percentage = $\frac{4}{8} = 50\%$

Answer:

The Middle Graph (the green-block model with 4 shaded blocks out of 10)