Question

Blythe shaded 4 columns and 3 single squares of a 100 square grid to represent the portion of days that it rained last year. What percent if the grid did she not shade?

Answer 1

We have been given that Blythe shaded 4 columns and 3 single squares of a 100 square grid to represent the portion of days that it rained last year.

We know that one column of a 100 square grid is equal to 10 single squares. So 4 columns will be equal to 4 times 10 single squares that is $4\times 10=40$.

Total shaded squares: $40+3=43$.

Now we will find the number of squares that are not shaded by subtracting number of shaded squares (43) from total squares (100).

$\text{Not shaded squares}=100-43$

$\text{Not shaded squares}=57$

Now we need to find 57 is what percent of 100.

$\frac{57}{100}\times 100\%=57\%$

Therefore, Blythe did not shade 57% of the grid.