Scientists compared two populations living in areas with different levels of long-term exposure to air pollution.
The table shows the lung disease diagnosis rates in the two populations.
| Level of exposure to air pollution | Lung disease diagnoses per 100 000 people per year |
|---|---|
| Low | 160 |
| High | 220 |
Calculate how much higher the diagnosis rate was in the high-exposure population, expressed as a percentage of the rate in the low-exposure population.
102 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.