Start with CP, SP, profit, and loss before moving to discount and marked price.
What to focus on
- Identify whether the question gives CP or SP.
- Use direct subtraction first.
Quick formula / idea
- Profit = SP - CP
- Loss = CP - SP
CP = 500, SP = 650, so profit = 150.
Practice prompts
- Find loss when CP = 720 and SP = 675.
- Find profit when CP = 840 and SP = 910.