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Calculations

2 guides about calculations.

How to Calculate a Discount Percentage (3 Simple Formulas)

Find the sale price, the amount you save and the discount percentage with three easy formulas, worked examples and a quick mental-math guide.

October 7, 2026 · 2 min read

How to Calculate Sales Tax: Formula and Examples

Learn how to calculate sales tax in seconds with one simple formula, worked examples at 6%, 7.25% and 8.5%, and a quick reference table.

October 6, 2026 · 2 min read