Question

Sofia recorded the grade level and instrument of everyone in the middle school School of Rock below.
School of Rock
Grade Guitar Bass Drums Keyboard
6th grade 15 17 11 10
7th Grade 20 11 16 18
8th Grade 16 10 19 17

What percent of the 6th graders in the School of Rock play drums? Round your answer to the nearest tenth of a percent

Answer 1

To determine the percentage of 6th graders who play drums at the School of Rock, we first need to find the total number of 6th graders and then the number of 6th graders who play drums.

From the table, the number of 6th graders who play drums is 11.

Now, we need to calculate the total number of 6th graders by adding up all the musicians in the 6th grade:

\[
\text{Total 6th graders} = \text{Guitar} + \text{Bass} + \text{Drums} + \text{Keyboard}
\]
\[
\text{Total 6th graders} = 15 + 17 + 11 + 10 = 53
\]

Next, to find the percentage of 6th graders who play drums, we use the formula:

\[
\text{Percentage} = \left( \frac{\text{Number of 6th graders who play drums}}{\text{Total number of 6th graders}} \right) \times 100
\]
\[
\text{Percentage} = \left( \frac{11}{53} \right) \times 100
\]

Now, calculate the fraction:

\[
\frac{11}{53} \approx 0.2075
\]

Then multiply by 100 to convert to a percentage:

\[
0.2075 \times 100 \approx 20.75
\]

Rounding to the nearest tenth of a percent, we get:

\[
20.8\%
\]

Thus, the percentage of 6th graders in the School of Rock who play drums is approximately **20.8%**.