A raincoat costs $79.25 today. If a similar raincoat cost $52.48 in 1983, what is the CPI?

Use the CPI formula: (price today ÷ price in the base year) × 100. Substituting the prices gives ($79.25 ÷ $52.48) × 100 ≈ 151. The correct choice is 151.

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