1. **State the problem:** Onacha spent $\frac{1}{4}$ of his salary on food. From the remainder, he spent $\frac{3}{9}$ on school fees and the rest on leisure. His salary was 5400. We need to find how much he spent on leisure. 2. **Identify the formula and rules:** - Total salary = 5400 - Food expense = $\frac{1}{4}$ of salary - Remaining salary after food = $1 - \frac{1}{4} = \frac{3}{4}$ - School fees = $\frac{3}{9}$ of the remainder - Leisure = remainder after school fees 3. **Calculate food expense:** $$\text{Food} = \frac{1}{4} \times 5400 = 1350$$ 4. **Calculate remainder after food:** $$\text{Remainder} = 5400 - 1350 = 4050$$ 5. **Calculate school fees:** $$\text{School fees} = \frac{3}{9} \times 4050 = \frac{1}{3} \times 4050 = 1350$$ 6. **Calculate leisure expense:** $$\text{Leisure} = 4050 - 1350 = 2700$$ 7. **Answer:** Onacha spent **2700** on leisure.