Calculadora de Porcentagem Online Grátis
6 simultaneous modes: X% of Y, what %, change, increase & decrease
The Percentage Calculator handles six common percentage problems at once — from finding what percent one number is of another, to calculating percentage increase and decrease. It's used by students checking exam scores, shoppers comparing discounts, and analysts tracking change over time. All six modes run simultaneously so you see every result without switching between tools.
Frequently Asked Questions
Sobre Esta Calculadora
Percentages are one of the most frequently used calculations in everyday life, yet the different problem types — finding a percentage of a number, working backwards from a result, or computing percentage change — each require a different formula. This calculator handles all six variations simultaneously, so you always get every answer without needing to re-enter data.
The six modes cover: X% of Y (e.g., "what is 30% of 250?"), what percentage X is of Y, percentage increase, percentage decrease, adding a percentage to a value, and subtracting a percentage. Each mode displays its formula alongside the result for full transparency.
Percentage calculations underpin a huge range of real-world tasks: tax computation, discount analysis, exam grading, profit margin tracking, and interest rate comparison. Whether you're a student, a shopper, or a financial analyst, having all six modes in one place saves time and reduces the chance of using the wrong formula.
Com a ajuda das matemáticas básicas você achará porcentagens em variações relativas simultaneamente e de maneira simplificada.
Exemplo Resolvido
Calculating a 15% tip on a $48 restaurant bill
Entradas:
- Bill amount: $48.00
- Tip percentage: 15%
Passo a Passo:
- Convert percentage to decimal: 15 ÷ 100 = 0.15
- Multiply bill by decimal: $48.00 × 0.15 = $7.20
- Add tip to bill: $48.00 + $7.20 = $55.20 total