Civil Service Exam (Professional) Numerical Ability — Ratio, Proportion & PercentageConcept Map
Civil Service Commission (CSC) loves to test Ratio, Proportion & Percentage through questions that span multiple sub-topics in one item. A concept map helps you see those cross-links in advance. This page will show the full Ratio, Proportion & Percentage concept map for Civil Service Exam (Professional) Numerical Ability once content generation completes.
Exam context
The Career Service Examination — Professional Level is conducted by Civil Service Commission (CSC) and is scheduled for Bi-annual — March and August 2026. The Numerical Ability subtest is marked as "~25% weightage" in the official pattern, and Ratio, Proportion & Percentage appears in position 4th of 9 in the Civil Service Exam (Professional) Numerical Ability review rotation. Passing mark: 80%. Recent Civil Service Exam (Professional) 2026 papers have drawn roughly 17 questions from this subject.
Ratio, Proportion & Percentage - Concept Map
Central Concept
Ratio, Proportion & Percentage
Related Concepts
Concept
Ratio
Sub Concepts
- Basic ratio definition
- Expressing ratios
- Simplifying ratios
- Converting mixed numbers to ratios
- Three-term ratios
Relationship To Central
fundamental building block
Concept
Proportion
Sub Concepts
- Cross multiplication
- Finding unknown terms
- Direct proportion
- Rate and speed problems
- Scale and measurement
Relationship To Central
application of ratio equality
Concept
Percentage
Sub Concepts
- Finding rate or percentage
- Finding base or original value
- Discount and markup
- Tax calculations
- Profit and loss
- Depreciation
Relationship To Central
special ratio with base 100
Concept
Word Problems
Sub Concepts
- Student surveys
- Shopping and commerce
- Transportation problems
- Financial calculations
- School enrollment scenarios
Relationship To Central
real-world applications
Concept Connections
To
Proportion
From
Ratio
Strength
strong
Relationship
Proportion is equality of two ratios
To
Percentage
From
Ratio
Strength
strong
Relationship
Percentage is a ratio with denominator 100
To
Cross Multiplication
From
Proportion
Strength
strong
Relationship
Cross multiplication solves proportion equations
To
Decimal Conversion
From
Percentage
Strength
strong
Relationship
Percentages convert to decimals for calculations
To
All Concepts
From
Word Problems
Strength
strong
Relationship
Real-world applications require all three concepts
To
Survey Problems
From
Finding Rate
Strength
moderate
Relationship
Surveys often require calculating rates and percentages
To
Original Price Problems
From
Finding Base
Strength
strong
Relationship
Finding original prices from discounted amounts
To
Depreciation
From
Profit Calculations
Strength
moderate
Relationship
Both involve comparing new and original values
To
Discount Calculations
From
Tax Calculations
Strength
moderate
Relationship
Similar formulas but opposite operations
To
Complex Proportions
From
Three-term Ratios
Strength
moderate
Relationship
Multi-variable proportion problems
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