Mathematics

Cost Price from Selling Price

Find cost price when selling price and profit percentage are known.

CP = SP × 100 / (100 + Profit%)

Formula Explanation

Reverse the profit percentage to recover the original cost.

Variables Explained

SP = Selling Price; Profit% = given profit.

Solved Example

SP = ₹1200, Profit = 20%. Find CP.
CP = 1200 × 100 / 120 = ₹1000.

Exam Tip

For loss, use (100 - Loss%) in denominator.