1. **State the problem:** A store sold 150 apples in total, and 60 of these were green apples. We need to find what percentage of the apples sold were green. 2. **Formula used:** The percentage of green apples is given by $$\text{Percentage} = \left(\frac{\text{Number of green apples}}{\text{Total apples sold}}\right) \times 100$$ 3. **Substitute the values:** $$\text{Percentage} = \left(\frac{60}{150}\right) \times 100$$ 4. **Simplify the fraction:** $$\frac{60}{150} = \frac{\cancel{60}}{\cancel{150}} = \frac{2}{5}$$ 5. **Calculate the percentage:** $$\frac{2}{5} \times 100 = 40$$ 6. **Answer:** 40% of the apples sold were green.