如何计算Percentage

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A percentage represents a ratio expressed as a fraction of 100. The word comes from Latin "per centum" meaning "by the hundred." Percentages are used everywhere: discounts, test scores, tax rates, nutrition labels, and statistics.

分步指南

1. 1Identify what you are given: the part, the whole, or the percentage
2. 2Use the formula: Percentage = (Part ÷ Whole) × 100
3. 3Rearrange for what you need: Part = (P/100) × Whole
4. 4Always double-check by verifying the part is less than the whole (unless > 100%)

例题解析