Matilda counted the birds that visited her bird feeder yesterday. She summarized the data in the bar graph shown. The percentage of birds that were goldfinches is
(A) $15 \%$
(B) $20 \%$
(C) $30 \%$
(D) $45 \%$
(E) $60 \%$

![](https://cdn.mathpix.com/cropped/2024_04_20_e85ef69091c57cb633f3g-020.jpg?height=323&width=439&top_left_y=1752&top_left_x=1298)
From the bar graph, Matilda saw 6 goldfinches, 9 sparrows, and 5 grackles.

In total, she saw $6+9+5=20$ birds.

This means that the percentage of birds that were goldfinches is $\frac{6}{20} \times 100 \%=\frac{3}{10} \times 100 \%=30 \%$.

ANsWER: $(\mathrm{C})$