A random sample of students were surveyed as to how much non-school screen time they had each week (for purposes of the survey, screen time was defined as: time spent online, on social media, watching TV, or playing video games) and if their grade average was above or below 80.
Screen Time
Hours	above	below
less than 4 hours	7	8
4-8 hours	14	11
8-12 hours	10	14
more than 12 hours	11	15

What percent of the total students reported a grade average above 80? Round your answer to the nearest whole number percent.

To calculate the percentage of students who reported a grade average above 80, we need to determine the total number of students and how many of them have an average grade above 80.

### Step 1: Calculate the total number of students
We sum all the students from both categories (above and below 80):

- **Less than 4 hours**: \( 7 + 8 = 15 \)
- **4-8 hours**: \( 14 + 11 = 25 \)
- **8-12 hours**: \( 10 + 14 = 24 \)
- **More than 12 hours**: \( 11 + 15 = 26 \)

The total number of students surveyed is:
\[
15 + 25 + 24 + 26 = 90
\]

### Step 2: Calculate the number of students with a grade average above 80
The total number of students with a grade average above 80 is the sum of the "above" column:

- **Less than 4 hours**: \( 7 \)
- **4-8 hours**: \( 14 \)
- **8-12 hours**: \( 10 \)
- **More than 12 hours**: \( 11 \)

The total number of students with a grade average above 80 is:
\[
7 + 14 + 10 + 11 = 42
\]

### Step 3: Calculate the percentage
Now we calculate the percentage of students with a grade average above 80 by dividing the number of students above 80 by the total number of students and multiplying by 100:

\[
\text{Percentage} = \left( \frac{42}{90} \right) \times 100 \approx 46.67
\]

Rounding to the nearest whole number, the percentage is:
\[
\boxed{47} \%
\]

Do you need further details or have any questions?

Here are some related questions:
1. What percentage of students reported a grade average below 80?
2. How many students reported 8-12 hours of screen time and a grade average above 80?
3. What percentage of students reported less than 4 hours of screen time?
4. How does the percentage of students with a grade average above 80 change as screen time increases?
5. How many students reported more than 12 hours of screen time and had a grade average below 80?

**Tip**: When dealing with surveys or categorical data, always make sure to sum the totals and calculate percentages for clear interpretations.

A random sample of students were surveyed as to how much non-school screen time they had each week (for purposes of the survey, screen time was defined as: time spent online, on social media, watching TV, or playing video games) and if their grade average was above or below 80. Screen Time Hours above below less than 4 hours 7 8 4-8 hours 14 11 8-12 hours 10 14 more than 12 hours 11 15 What percent of the total students reported a grade average above 80? Round your answer to the nearest whole number percent.

Learn how to calculate the percentage of students who reported a grade average above 80 based on screen time. This problem covers key mathematical concepts, including percentages and basic arithmetic. Suitable for students in Grades 6-8.

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