A survey asked a random sample students if they estimated they spent more or less than an hour a day on social media.

Question

Social Media
Grade More Less Total
7th grade 27 19 46
8th grade 12 19 31
Total 39 38 77

What percent of the 8th graders estimated they spend less than an hour a day on social media? Round your answer to the nearest whole number percent.

Answer 1

To find the percentage of 8th graders who estimated they spend less than an hour a day on social media, we can use the following formula:

\[ \text{Percentage} = \left( \frac{\text{Number of 8th graders who spend less}}{\text{Total number of 8th graders}} \right) \times 100 \]

From the data provided:

• Number of 8th graders who estimated they spend less than an hour a day: 19
• Total number of 8th graders: 31

Now we can substitute these values into the formula:

\[ \text{Percentage} = \left( \frac{19}{31} \right) \times 100 \]

Calculating:

\[ \frac{19}{31} \approx 0.6129 \]

Now multiplying by 100 to convert to a percentage:

\[ 0.6129 \times 100 \approx 61.29% \]

Rounding to the nearest whole number gives us:

\[ \text{Percentage} \approx 61% \]

Thus, the percentage of 8th graders who estimated they spend less than an hour a day on social media is 61%.