Question

Shade 12 squares on the 4-by-10 grid. What percent to is shaded?

Answer 1

Answer: 30%

Step-by-step explanation:

Total number of squares: 4*10=40

Shaded squares: 12

Fraction of shaded squares: 12/40

If you make the denominator 100, then the numerator is the percentage:

$\frac{12}{40} * \frac{2.5}{2.5}=\frac{30}{100}$

Answer 2

On a 10 by 4 grid, there would be 40 squares. If you were to shade 12 of those squares, it can be shown as the fraction:

$\frac{12}{40}$

12/40 = 0.3

to get a percentage, we would have to multiply by 100

30% is to be shaded