Math Problem Statement
Solution
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Math Problem Analysis
Mathematical Concepts
Price Indices
Composite Index Calculation
Weighted Averages
Percentage Increases
Formulas
Expenditure in 2006 = (Expenditure in 2008 / Price Index in 2008) × 100
Composite Index = (Weight × Price Index) for each type of fuel
Expenditure in 2008 = (Expenditure in 2006 × Composite Index) / 100
New Price Index = Old Price Index × (1 + Percentage Increase)
Theorems
Weighted Average Theorem
Percentage Change Calculation
Suitable Grade Level
Grade 11-12
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