Compare the selling price with the cost price to find profit or loss.CP $100 · SP $125 · Profit $25

Profit and Loss

Cost, selling price, percentage, discount, and break-even

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Market counter

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Product

Currency

Cost price$100

Selling price$125

Quantity1

Marked price$150

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Live result

Total cost$100

Total revenue$125

ResultProfit $25

Percentage25%

Formulas

Profit = SP − CP · Loss = CP − SP

Profit or loss % = difference ÷ CP × 100

Discount % = discount ÷ marked price × 100

Selling price is above cost price, so this transaction earns a profit.

Object focus

Tap the product, price tags, coin stacks, or result balance.

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Teacher narration

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Learning objectives

Distinguish cost price from selling price.
Calculate profit, loss, and break-even.
Express profit or loss as a percentage of cost.
Connect marked price, discount, and selling price.
Calculate totals for several items.

Key relationships

Profit: SP − CP when SP > CP.

Loss: CP − SP when CP > SP.

Percentage: difference ÷ CP × 100.

Break-even: total revenue = total cost.

Suggested experiments

Keep cost fixed and move selling price across break-even.
Compare a 10% discount with a 10% loss.
Increase quantity and observe total profit.
Change currency and verify that percentages stay unchanged.

Questions for exploration

Why is profit percentage based on cost price?
Can a discounted sale still earn a profit?
How does a loss per item affect a large batch?

Seven-question market check

Answer all seven questions.

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