Percentages & Decimals (Shopping/Finance): Used when calculating discounts, sales tax, tips, or interest rates.
Ratios & Proportions (Cooking/Baking): Essential for adjusting recipes (e.g., doubling or halving ingredients).
Geometry & Measurement (Home Improvement): Used for calculating area for paint, floor tiles, or gardening space.
Arithmetic (Budgeting): Used to add, subtract, multiply, or divide for balancing checkbooks and managing monthly expenses.