9. Marked Price and Discount

Question:
A shopkeeper marks his goods at 30% above the cost price and offers a discount of 20%. Find his profit percentage.

Solution:
Let CP = ₹100
Marked Price (MP) = ₹100 × (1 + 30/100) = ₹130
SP = MP × (1 - 20/100) = ₹130 × 0.80 = ₹104
Profit = SP - CP = ₹104 - ₹100 = ₹4
Profit % = (Profit / CP) × 100 = (4 / 100) × 100 = 4%