1. **Problem statement:** A person buys oranges at the rate of 6 per 10 units of money and sells them at the rate of 6 per 8 units of money. We need to find the profit or loss percentage. 2. **Understanding the problem:** - Cost Price (CP) for 6 oranges = 10 units - Selling Price (SP) for 6 oranges = 8 units 3. **Formula for profit or loss percentage:** $$\text{Profit or Loss \%} = \frac{\text{Profit or Loss}}{\text{Cost Price}} \times 100$$ 4. **Calculate profit or loss:** - Profit or Loss = SP - CP - Here, SP = 8 units, CP = 10 units - Profit or Loss = 8 - 10 = -2 units (negative means loss) 5. **Calculate loss percentage:** $$\text{Loss \%} = \frac{2}{10} \times 100 = 20\%$$ 6. **Conclusion:** The person incurs a loss of 20%.