About This Tool
What is Percentage Calculator?
A tool for performing common percentage calculations. Supports three modes: 'What percent is A of B', 'What is A% of B', and 'Percentage change from A to B'. Useful for discount rates, growth rates, and ratio calculations.
How to Use
- Select the calculation mode (ratio, value, or change rate).
- Enter the required values A and B.
- Click 'Calculate'.
- The result is displayed instantly.
Key Features
- Three percentage calculation modes
- Clean, intuitive interface
- Precise calculations to decimal points
- Instant result output
Tips
- Use the 'change rate' mode for calculating discount percentages.
- ROI calculations work well with the 'change rate' mode.
- Use the 'ratio' mode to find profit margins relative to cost.
Percentage Calculator
Perform common percentage calculations
Calculate A percent of B
Frequently Asked Questions
Como calcular porcentagem?▼
X% de Y = X × Y / 100. Ex: 20% de 150 = 30.
Porcentagem de aumento/diminuição?▼
((Novo - Original) / Original) × 100. Positivo = aumento, negativo = diminuição.
Pontos percentuais vs porcentagem?▼
De 10% para 15% = aumento de 5 pontos percentuais, mas 50% de aumento relativo.
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