Let's solve the problem step-by-step.
1. Identify the Relevant Data:
We need to find the percentage of students who spend more than 12 hours a week on screens and have a grade average above 80.
2. Extract the Data from the Table:
From the table:
- Number of students who spend more than 12 hours on screens and have a grade average above 80: 15
- Total number of students who spend more than 12 hours on screens: 34
3. Calculate the Percentage:
To find the percentage, we use the formula:
[tex]\[
\text{Percentage} = \left( \frac{\text{Number of students with grade average above 80}}{\text{Total number of students who spend more than 12 hours}} \right) \times 100
\][/tex]
Substituting the given values:
[tex]\[
\text{Percentage} = \left( \frac{15}{34} \right) \times 100
\][/tex]
4. Simplify the Calculation:
Perform the division:
[tex]\[
\frac{15}{34} \approx 0.441
\][/tex]
Convert this to a percentage:
[tex]\[
0.441 \times 100 = 44.1
\][/tex]
5. Round the Percentage:
The final step is to round the percentage to the nearest tenth:
[tex]\[
44.1
\][/tex]
Thus, the percentage of students who spend more than 12 hours a week on screens and report a grade average above 80 is [tex]\( 44.1\% \)[/tex].
