Question

the shaded area on the grid represents the part of a rectangular wall that was painted. each small square on the wall has the same dimensions. what percentage of the wall was painted? a 64% b 24% c 60% d 16%

Explanation:

Step1: Count total squares

Count the total number of small - squares on the wall. There are 10 columns and 4 rows, so the total number of squares is $10\times4 = 40$.

Step2: Count painted squares

Count the number of shaded (painted) squares. There are 24 shaded squares.

Step3: Calculate percentage

The percentage of painted area is calculated as $\frac{\text{Number of painted squares}}{\text{Total number of squares}}\times100\%$. So, $\frac{24}{40}\times100\%=60\%$.

Answer:

C. 60%