1. **State the problem:** We are given a survey of 2,500 people aged 16–24 and the percentage of respondents who took public transport a certain number of times per week. We want to find how many people took the bus at least 5 times in the last week. 2. **Identify the relevant data:** The categories for trips per week are: - 0–1 trip: 18% - 2–4 trips: 27% - 5–9 trips: 45% - 10+ trips: 10% We want the number of people who took the bus at least 5 times, which includes the 5–9 trips and 10+ trips categories. 3. **Calculate the total percentage for at least 5 trips:** $$45\% + 10\% = 55\%$$ 4. **Calculate the number of people:** $$\text{Number of people} = 55\% \times 2500 = \frac{55}{100} \times 2500$$ 5. **Simplify the calculation:** $$= \cancel{\frac{55}{100}} \times 2500 = 0.55 \times 2500$$ 6. **Final multiplication:** $$= 1375$$ **Answer:** 1375 people took the bus at least 5 times in the last week.