Listen to this mini-lecture about teenage social media use, and answer the following questions. Question 1 and 2. Complete the following sentences with a NUMBER only. Do NOT write words.1. Viewing social media posts commonly has a negative impact on Answer Question 1[input] of Australian teenagers.简答题
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Question

Listen to this mini-lecture about teenage social media use, and answer the following questions. Question 1 and 2. Complete the following sentences with a NUMBER only. Do NOT write words.1. Viewing social media posts commonly has a negative impact on Answer Question 1[input] of Australian teenagers.简答题

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BlackTom AI · Accepted Answer

The mini-lecture reports that one quarter of Australian teenagers experience negative effects from viewing social media posts — that is 25%.

1. Relevant knowledge points and concepts
- Percentages express a part of a whole as 100 units; 25% means 25 out of every 100.
- Survey-derived statistics report the proportion (affected / total) × 100.
- “Negative impact” here refers to self-reported harmful effects (e.g., lowered self‑esteem, anxiety) linked to viewing social media content.

2. Step-by-step reasoning
- The lecture gives a proportion of teenagers affected. Interpreting the phrase “one quarter” or the numeric statistic leads directly to 25%.
- Convert a fraction to a percentage: fraction × 100 = percentage.

3. Calculations with intermediate steps
- One quarter as a fraction: 1/4.
- Convert to decimal: 1 ÷ 4 = 0.25.
- Convert to percent: 0.25 × 100 = 25%.
- Example with counts: if 250 teenagers out of 1000 report negative impact, 250 ÷ 1000 = 0.25 → 0.25 × 100 = 25%.

4. Why the correct answer is correct
- The lecture’s statistic corresponds exactly to the fraction 1/4, which equals 25%. Therefore the numeric answer required (a number only) is 25.

5. Why other possible percentages would be incorrect (brief)
- 10% would understate the reported proportion (10 per 100 vs the lecture’s 25 per 100).
- 50% would overstate it (half the group rather than one quarter).
- Any value other than 25 does not match the specific statistic provided in the mini-lecture.

6. Conclusion
- The correct numeric response is 25, matching the provided authoritative answer of 25%.

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