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Cluster Notes Maths

Common Profit and Loss Mistakes

Avoid wrong base, confused discount logic, and reverse ratio mistakes.

Coaching Notes

Study Notes

Exam ready Quick revision

Avoid wrong base, confused discount logic, and reverse ratio mistakes.

What to focus on

  • Profit% and Loss% are based on CP, not SP.
  • Discount% is based on MP, not CP.

Quick formula / idea

  • Right base = right answer

Selling at 20% loss means SP:CP = 80:100 = 4:5, not 5:4.

Practice prompts

  • Explain why discount and loss are not the same thing.
  • Convert 25% loss into SP:CP ratio.
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