1. **State the problem:** We have two groups, children and adults, with totals 87 and 39 respectively, each split into 4 equal sections. We want to find the number of children and adults in each section. 2. **Formula used:** To find the number in each section, divide the total number by the number of sections: $$\text{Number per section} = \frac{\text{Total number}}{\text{Number of sections}}$$ 3. **Calculate children per section:** $$\frac{87}{4} = \frac{\cancel{87}}{\cancel{4}} = 21.75$$ This means each section has 21.75 children. 4. **Calculate adults per section:** $$\frac{39}{4} = \frac{\cancel{39}}{\cancel{4}} = 9.75$$ This means each section has 9.75 adults. 5. **Interpretation:** Since we cannot have fractional people, this suggests the numbers are averages or the sections are not strictly equal in whole numbers. **Final answer:** Each of the 4 sections has approximately 21.75 children and 9.75 adults.