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Cluster Notes Maths

Profit and Loss Tricks for Faster Solving

Use ratio conversion and benchmark percentages to reduce calculation time.

5 min read Updated April 2026 ExamPrepWay Team
Coaching Notes

Study Notes

Exam ready Quick revision

Use ratio conversion and benchmark percentages to reduce calculation time.

What to focus on

  • Convert 20% profit into SP:CP = 120:100 = 6:5.
  • Use ratio form when CP or SP is missing.

Quick formula / idea

  • At x% profit, SP:CP = (100 + x):100

At 25% profit, SP:CP = 5:4. If SP = 450, then CP = 360.

Practice prompts

  • At 20% loss, if SP = 480, find CP.
  • At 12.5% profit, if CP = 640, find SP.
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