In a clinical trial, volunteers received either a higher or a lower dose of a medicine. The table shows the percentage of volunteers in each group who reported nausea.
| Dose of medicine | Volunteers reporting nausea (%) |
|---|---|
| Higher dose | 32 |
| Lower dose | 8 |
Calculate the percentage decrease in the proportion of volunteers reporting nausea in the lower-dose group compared with the higher-dose group.
87 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.