Respuesta :

13 shades, 25 total =13/25, = 52%
so the total number of squares is 25

so:

[tex]5 \times 5 = 25[/tex]

and the amount of shaded squares in the second picture is 13

so:

[tex] \frac{13}{25} = 0.52 = 52\%[/tex]

your answer is 52%.
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