[{"term": "Ratio", "definition": "A comparison of two quantities (e.g., 3:5 or 3/5)."}, {"term": "Proportion", "definition": "An equation showing two ratios are equal (a/b = c/d)."}, {"term": "Unit Rate", "definition": "A rate with a denominator of 1 (e.g., $3 per hour)."}, {"term": "Cross-Multiply", "definition": "A method for solving proportions: a/b = c/d means a × d = b × c."}]