Ratio, Proportion & Percentage

Ratio: Comparison of two quantities • a : b means a to b • Example: 3 : 4, 2 : 5 • Can be simplified

Proportion: Equality of two ratios • a : b = c : d • Product of means = Product of extremes • Example: 2 : 3 = 4 : 6 (2×6 = 3×4 = 12)

Percentage: • Out of 100 • Formula: (Part/Whole) × 100 • 1/4 = 0.25 = 25% • 1/2 = 0.5 = 50% • 3/4 = 0.75 = 75%