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SubjectsMathematicsArithmeticChapter 2 — Percentage & Ratio2.2 Ratio & Proportion

Topic 2.2 · Mathematics · Percentage & Ratio

Ratio & Proportion

Ratio & Proportion 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, ratio & proportion 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

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

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

2.1 Percentage2.3 Partnership2.4 Average & Mixtures
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