AI Study Pack

percentages

Quantitative AptitudeSSCGraduate Level

AI-generated cheatsheet with key concepts, formulas, and common mistakes — plus audio, MCQs, mind maps & more.

AI-generated

Percentages Cheat Sheet

Key Definitions


  • Percentage: A fraction expressed as a part of 100.

  • Increase/Decrease: Change in value expressed as a percentage of the original value.

Important Concepts

Calculating Percentages


  • To find a percentage of a number:

  • Percentage = (Part / Whole) × 100

  • To find the whole from the part and percentage:

  • Whole = (Part / Percentage) × 100

Percentage Increase/Decrease


  • Increase:

  • New Value = Original Value × (1 + (Percentage Increase / 100))

  • Decrease:

  • New Value = Original Value × (1 - (Percentage Decrease / 100))

Key Formulas


Percentage Change = ((New Value - Old Value) / Old Value) × 100
  • New Value: Final amount after change

  • Old Value: Initial amount before change

Common Mistakes to Avoid


Common Mistake: Confusing increase with decrease; always check the sign in formulas.

Memory Tricks


Tip: "Part-Whole-100" — Remember that to find a percentage, relate part to whole out of 100.

Key Diagrams



Percentage Calculation:
Part / Whole = Percentage / 100


Increase/Decrease:
Original Value --(Increase)--> New Value
Original Value --(Decrease)--> New Value

This pack also includes

Audio Podcast
5-min summary
10 MCQs
Exam-pattern
Mind Map
Visual connections
Flashcards
Spaced repetition

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