Understanding Percentages
Percentages are a way to express a number as a fraction of 100. The word "percent" literally means "per hundred." Understanding percentages is essential for everyday calculations involving discounts, taxes, tips, and statistics.
Percentage Formulas
Find X% of Y
Result = Y × (X / 100)
X is what % of Y?
Percent = (X / Y) × 100
Percentage Change
Change = ((New - Old) / Old) × 100
Increase by X%
New = Original × (1 + X/100)
FAQ
How do I convert a decimal to a percentage?
Multiply the decimal by 100. For example, 0.25 × 100 = 25%
How do I convert a percentage to a decimal?
Divide the percentage by 100. For example, 25% ÷ 100 = 0.25