Profit and Loss – Speed Tricks and Discount Methods
Solve profit and loss questions quickly using shortcut formulas and smart percentage techniques.
Core Formulas
- Profit = SP − CP
- Loss = CP − SP
- Profit% = (Profit / CP) × 100
- SP = CP × (100 ± %)/100
Shortcut Trick 1
Q: CP = 100, Profit = 20%
Answer:
SP = 120
Shortcut Trick 2 (Discount)
Q: MP = 1000, Discount = 10%
Answer:
SP = 900
Successive Percentage Trick
Formula:
Net change = a + b + (ab/100)
Example:
+20% and −10% → 20 − 10 − (200/100) = 8%
Exam Level Questions
1. CP = 500, SP = 600 → profit %?
Answer: 20%
2. CP = 800, loss = 25% → SP?
Answer: 600
3. MP increased by 20%, discount 10% → profit?
Answer: 8%
Common Mistake
Students directly add percentages instead of using the correct formula.
Speed Tip
Always convert values into percentage form to reduce calculation time.
Shaktimatha Learning
Speed Maths • Bank Exam Preparation
Speed Maths • Bank Exam Preparation
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