O Levels Biology (5090)•5090/11/M/J/25
Explanation
Percentage decrease calculation from 2009 to 2018
Steps:
- Identify deaths in 2009 and 2018 from the table.
- Calculate decrease: 2009 value minus 2018 value.
- Compute percentage: (decrease / 2009 value) × 100 = 9%.
- Verify against other options using full table data.
Why B is correct:
- Percentage decrease formula confirms exact 9% drop from 2009 to 2018 values in the table.
Why the others are wrong:
- A: Table shows increases in some years (e.g., 2010–2011).
- C: Largest one-year drop is between 2016–2017, not 2017–2018.
- D: Actual decrease from 2009 to 2019 is 10%, not 7%.
Final answer: B
Topic: Disease
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