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A florist buys roses worth ₹2400. Many of them wilt, so he sells the whole lot at a loss of 12.5%. What is the selling price?

Class 7Comparing QuantitiesComparing Quantities
  • A₹300
  • B₹2700
  • C₹2387.50
  • D₹2100

Step-by-Step Solution

Loss is taken on the cost price: 12.5% of . SP = CP − Loss = 2400 − 300 = ₹2100. ₹300 is the loss, not the selling price. ₹2700 adds the loss instead of subtracting it, and ₹2387.50 subtracts ₹12.50, treating the percentage as if it were rupees.
Answer: D) ₹2100

Key idea: Reading the question carefully

Three things to check before you compute:

1. **What's being asked?** Profit % needs CP and SP. SI needs P, R, T.
2. **What units are the inputs in?** Time in months → convert to years (divide by 12). Rate already per annum → leave it.
3. **What's the base of the percentage?** Profit/loss % is on COST price, not selling price. Discount % is on MARKED price, not on what you actually paid.

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