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Kavita buys 40 kg of mangoes for ₹2800 and pays ₹200 to have them carted to her stall. She sells the whole lot for ₹3600. Find her profit percent.

Class 8Comparing QuantitiesComparing Quantities
  • A28.6%
  • B16.7%
  • C20%
  • D21.4%

Step-by-Step Solution

Cartage is part of the cost, so total CP = 2800 + 200 = 3000. Profit = 3600 − 3000 = 600 and profit % = %. Trap: ignoring the cartage gives %, using the selling price as the base gives 16.7%, and 21.4% subtracts the cartage from the profit but forgets to add it to the cost.
Answer: C) 20%

Key idea: Discount

A discount is a reduction off the **marked price** (MP), not the cost price. The selling price (SP) is what the customer actually pays.

**SP = MP − Discount**
**Discount % = (Discount / MP) × 100**

Example: shirt MP ₹800, discount 25%. Discount amount = 25% of 800 = 200. SP = 800 − 200 = 600.

Note: discount % is calculated on MP. Profit/loss % (Class 7) is on CP. Don't mix them up.

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