AI Study Pack
percentage
PercentageCBSEClass 12
AI-generated cheatsheet with key concepts, formulas, and common mistakes — plus audio, MCQs, mind maps & more.
AI-generated
Percentage Cheat Sheet
Key Definitions
- Percentage: A way to express a number as a fraction of 100. ✅
- Base: The original value from which the percentage is calculated. ✅
- Rate: The percentage value itself. ✅
Important Concepts
Finding Percentages
- To find a percentage of a number, multiply the number by the percentage rate and divide by 100.
- Example: To find 20% of 50, calculate
50 * 20 / 100 = 10.
Percentage Increase/Decrease
- Increase: New Value = Original Value + (Original Value * Rate / 100) ✅
- Decrease: New Value = Original Value - (Original Value * Rate / 100) ✅
Key Formulas
Percentage = (Part / Whole) * 100- Part: The portion of the whole. ✅
- Whole: The total or original amount. ✅
New Value = Original Value ± (Original Value * Rate / 100)
- Rate: The percentage increase or decrease. ✅
Common Mistakes to Avoid
Common Mistake: Forgetting to convert the percentage to a decimal when using it in calculations.
Memory Tricks
Tip: "PERCENT" —
- Part
- Equal to
- Rate
- Calculate
- Express
- New value
- Total
Key Diagrams
+---------+
| 100% |
| |
| 50% |---------> 50% of 100
| |
| 25% |---------> 25% of 100
+---------+
This pack also includes
Audio Podcast
5-min summary
10 MCQs
Exam-pattern
Mind Map
Visual connections
Flashcards
Spaced repetition
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