1. **State the problem:** Prince had 300 oranges and sold 240 of them. We need to find the percentage of oranges left. 2. **Calculate the number of oranges left:** $$300 - 240 = 60$$ 3. **Calculate the percentage of oranges left:** The percentage left is given by $$\frac{\text{oranges left}}{\text{total oranges}} \times 100$$ Substitute the values: $$\frac{60}{300} \times 100 = 20\%$$ 4. **Final answer:** Prince has 20% of the oranges left.