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Question:

Caleb recorded the grade level and instrument of everyone in the middle school School of Rock below.
\begin{tabular}{|c|c|c|c|c|c|}
\hline \multicolumn{6}{|c|}{ School of Rock } \\
\hline & Guitar & Bass & Drums & Keyboard & Total \\
\hline 6th grade & 20 & 20 & 11 & 14 & 65 \\
\hline 7th Grade & 17 & 16 & 15 & 12 & 60 \\
\hline 8th Grade & 13 & 16 & 12 & 14 & 55 \\
\hline Total & 50 & 52 & 38 & 40 & 180 \\
\hline
\end{tabular}

What percent of the 7th graders in the School of Rock play keyboard? Round your answer to the nearest whole number percent.



Answer :

GinnyAnswer
To determine the percentage of 7th graders who play keyboard in the School of Rock, follow these steps:

1. Find the total number of 7th graders:
According to the table, the total number of 7th graders is 60.

2. Find the number of 7th graders who play keyboard:
From the table, the number of 7th graders playing keyboard is 12.

3. Calculate the percentage:
The percentage of 7th graders who play keyboard is calculated by dividing the number of 7th graders who play keyboard by the total number of 7th graders, then multiplying by 100 to convert the decimal to a percentage.

[tex]\[ \text{Percentage} = \left( \frac{\text{Number of 7th graders who play keyboard}}{\text{Total number of 7th graders}} \right) \times 100 \][/tex]

Plugging in the numbers:

[tex]\[ \text{Percentage} = \left( \frac{12}{60} \right) \times 100 = 20.0 \][/tex]

4. Round to the nearest whole number:
The percentage calculated is 20.0. When rounded to the nearest whole number, it remains 20.

Therefore, the percentage of 7th graders in the School of Rock who play keyboard is 20%.

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