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SubjectsMathematicsArithmeticChapter 2 — Percentage & Ratio2.1 Percentage

Topic 2.1 · Mathematics · Percentage & Ratio

Percentage

Percentage is studied as part of "Percentage & Ratio" (Arithmetic) in Mathematics. Percentage, ratio-proportion, partnership and averages are the most frequently asked arithmetic topics.

In the examination context, percentage carries conceptual questions that test both factual recall and analytical understanding. Revise this topic in sequence with the rest of the chapter so that chronological and thematic links are clear.

Important Facts

Percentage change
Final − initial divided by initial × 100
Ratio
A : B compares quantities of the same kind
Average
Sum ÷ number of items
Partnership
Profits shared in ratio of capital × time

Key Points

  • Percentage change — Final − initial divided by initial × 100
  • Ratio — A : B compares quantities of the same kind
  • Average — Sum ÷ number of items
  • Partnership — Profits shared in ratio of capital × time

Important Names

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Exam-Oriented Notes
  • »Master percentage ↔ fraction conversions (1/8 = 12.5%). Successive percentage change uses the formula a + b + ab/100.

Related topics

2.2 Ratio & Proportion2.3 Partnership2.4 Average & Mixtures
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